buildroot: Move to 2018.08

Upstream changelog:

 https://git.buildroot.net/buildroot/plain/CHANGES?id=2018.08

Set BR2_GCC_VERSION_6_X=y in all of the configs that include hostboot,
as the default has moved to GCC 7 and hostboot cannot build with a
modern compiler.

We are carrying a patch to dtc in our buildroot tree that fixes a
segfault when converting the powernv device tree. It has been submitted
upstream to buildroot (and the patch itself is upstream in dtc, but not
a released version).

Host packages updated:

  libxml2: 2.9.7 -> 2.9.8
  lz4: v1.8.1.2 -> v1.8.2
  zstd: v1.3.3 -> v1.3.5
  dtc: 1.4.4 -> 1.4.7

Shipped packages updated:

  busybox: 1.29.0 -> 1.29.2
  linux-firmware: 65b1c68c63f974d72610db38dfae49861117cae2 -> 8d69bab7a3da1913113ea98cefb73d5fa6988286
  ethtool: 4.15 -> 4.16
  util-linux: 2.32 -> 2.32.1
  dtc: 1.4.4 -> 1.4.7
  elfutils: 0.169 -> 0.171

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower/configs/barreleye_defconfig b/openpower/configs/barreleye_defconfig
index 1bd0649..5cc7122 100644
--- a/openpower/configs/barreleye_defconfig
+++ b/openpower/configs/barreleye_defconfig
@@ -1,6 +1,7 @@
 BR2_powerpc64le=y
 BR2_powerpc_power8=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
+BR2_GCC_VERSION_6_X=y
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"
diff --git a/openpower/configs/firestone_defconfig b/openpower/configs/firestone_defconfig
index ff11c6a..7ad89f9 100644
--- a/openpower/configs/firestone_defconfig
+++ b/openpower/configs/firestone_defconfig
@@ -1,6 +1,7 @@
 BR2_powerpc64le=y
 BR2_powerpc_power8=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
+BR2_GCC_VERSION_6_X=y
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"
diff --git a/openpower/configs/garrison_defconfig b/openpower/configs/garrison_defconfig
index 9b157d5..2664a79 100644
--- a/openpower/configs/garrison_defconfig
+++ b/openpower/configs/garrison_defconfig
@@ -1,6 +1,7 @@
 BR2_powerpc64le=y
 BR2_powerpc_power8=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
+BR2_GCC_VERSION_6_X=y
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"
diff --git a/openpower/configs/habanero_defconfig b/openpower/configs/habanero_defconfig
index 319be3d..0ed8384 100644
--- a/openpower/configs/habanero_defconfig
+++ b/openpower/configs/habanero_defconfig
@@ -2,6 +2,7 @@
 BR2_powerpc_power8=y
 BR2_GLOBAL_PATCH_DIR="$(BR2_EXTERNAL_OP_BUILD_PATH)/patches/habanero-patches"
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
+BR2_GCC_VERSION_6_X=y
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"
diff --git a/openpower/configs/p9dsu_defconfig b/openpower/configs/p9dsu_defconfig
index 2e048ee..ee4420b 100644
--- a/openpower/configs/p9dsu_defconfig
+++ b/openpower/configs/p9dsu_defconfig
@@ -1,6 +1,7 @@
 BR2_powerpc64le=y
 BR2_powerpc_power8=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
+BR2_GCC_VERSION_6_X=y
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"
diff --git a/openpower/configs/palmetto_defconfig b/openpower/configs/palmetto_defconfig
index 0e71aef..4f68e50 100644
--- a/openpower/configs/palmetto_defconfig
+++ b/openpower/configs/palmetto_defconfig
@@ -2,6 +2,7 @@
 BR2_powerpc_power8=y
 BR2_GLOBAL_PATCH_DIR="$(BR2_EXTERNAL_OP_BUILD_PATH)/patches/palmetto-patches"
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
+BR2_GCC_VERSION_6_X=y
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"
diff --git a/openpower/configs/pseries_defconfig b/openpower/configs/pseries_defconfig
index 12cea02..b737802 100644
--- a/openpower/configs/pseries_defconfig
+++ b/openpower/configs/pseries_defconfig
@@ -1,6 +1,7 @@
 BR2_powerpc64le=y
 BR2_powerpc_power8=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
+BR2_GCC_VERSION_6_X=y
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"
 BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV=y
diff --git a/openpower/configs/romulus_defconfig b/openpower/configs/romulus_defconfig
index 918bf0b..3519e90 100644
--- a/openpower/configs/romulus_defconfig
+++ b/openpower/configs/romulus_defconfig
@@ -1,6 +1,7 @@
 BR2_powerpc64le=y
 BR2_powerpc_power8=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
+BR2_GCC_VERSION_6_X=y
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"
diff --git a/openpower/configs/vesnin_defconfig b/openpower/configs/vesnin_defconfig
index a755844..4ae7bb8 100644
--- a/openpower/configs/vesnin_defconfig
+++ b/openpower/configs/vesnin_defconfig
@@ -2,6 +2,7 @@
 BR2_powerpc_power8=y
 BR2_GLOBAL_PATCH_DIR="$(BR2_EXTERNAL_OP_BUILD_PATH)/patches/vesnin-patches"
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
+BR2_GCC_VERSION_6_X=y
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"
diff --git a/openpower/configs/witherspoon_defconfig b/openpower/configs/witherspoon_defconfig
index a8367c0..5b53a48 100644
--- a/openpower/configs/witherspoon_defconfig
+++ b/openpower/configs/witherspoon_defconfig
@@ -1,6 +1,7 @@
 BR2_powerpc64le=y
 BR2_powerpc_power8=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
+BR2_GCC_VERSION_6_X=y
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"
diff --git a/openpower/configs/witherspoon_dev_defconfig b/openpower/configs/witherspoon_dev_defconfig
index 00fc1f1..587d098 100644
--- a/openpower/configs/witherspoon_dev_defconfig
+++ b/openpower/configs/witherspoon_dev_defconfig
@@ -1,6 +1,7 @@
 BR2_powerpc64le=y
 BR2_powerpc_power8=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
+BR2_GCC_VERSION_6_X=y
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"
diff --git a/openpower/configs/zaius_defconfig b/openpower/configs/zaius_defconfig
index aa0b727..25b796a 100644
--- a/openpower/configs/zaius_defconfig
+++ b/openpower/configs/zaius_defconfig
@@ -1,6 +1,7 @@
 BR2_powerpc64le=y
 BR2_powerpc_power8=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
+BR2_GCC_VERSION_6_X=y
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"