reset upstream subtrees to yocto 2.6

Reset the following subtrees on thud HEAD:

  poky: 87e3a9739d
  meta-openembedded: 6094ae18c8
  meta-security: 31dc4e7532
  meta-raspberrypi: a48743dc36
  meta-xilinx: c42016e2e6

Also re-apply backports that didn't make it into thud:
  poky:
    17726d0 systemd-systemctl-native: handle Install wildcards

  meta-openembedded:
    4321a5d libtinyxml2: update to 7.0.1
    042f0a3 libcereal: Add native and nativesdk classes
    e23284f libcereal: Allow empty package
    030e8d4 rsyslog: curl-less build with fmhttp PACKAGECONFIG
    179a1b9 gtest: update to 1.8.1

Squashed OpenBMC subtree compatibility updates:
  meta-aspeed:
    Brad Bishop (1):
          aspeed: add yocto 2.6 compatibility

  meta-ibm:
    Brad Bishop (1):
          ibm: prepare for yocto 2.6

  meta-ingrasys:
    Brad Bishop (1):
          ingrasys: set layer compatibility to yocto 2.6

  meta-openpower:
    Brad Bishop (1):
          openpower: set layer compatibility to yocto 2.6

  meta-phosphor:
    Brad Bishop (3):
          phosphor: set layer compatibility to thud
          phosphor: libgpg-error: drop patches
          phosphor: react to fitimage artifact rename

    Ed Tanous (4):
          Dropbear: upgrade options for latest upgrade
          yocto2.6: update openssl options
          busybox: remove upstream watchdog patch
          systemd: Rebase CONFIG_CGROUP_BPF patch

Change-Id: I7b1fe71cca880d0372a82d94b5fd785323e3a9e7
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/poky/meta/recipes-core/systemd/systemd/0001-Remove-fstack-protector-flags-to-workaround-musl-bui.patch b/poky/meta/recipes-core/systemd/systemd/0001-Remove-fstack-protector-flags-to-workaround-musl-bui.patch
index e913e3f..d745800 100644
--- a/poky/meta/recipes-core/systemd/systemd/0001-Remove-fstack-protector-flags-to-workaround-musl-bui.patch
+++ b/poky/meta/recipes-core/systemd/systemd/0001-Remove-fstack-protector-flags-to-workaround-musl-bui.patch
@@ -1,6 +1,6 @@
-From e361f6b4aefae57efff7e457df8db4d1067bec23 Mon Sep 17 00:00:00 2001
+From 9e3816bcaa36e1a11647ca0cf4f8044449c77fe0 Mon Sep 17 00:00:00 2001
 From: Chen Qi <Qi.Chen@windriver.com>
-Date: Wed, 28 Feb 2018 21:50:23 -0800
+Date: Mon, 2 Jul 2018 15:28:22 +0800
 Subject: [PATCH] Remove fstack-protector flags to workaround musl build
 
 Remove fstack-protector and fstack-protector-strong flags to fix
@@ -8,7 +8,7 @@
 
   undefined reference to `__stack_chk_fail_local'
 
-Upstream-Status: Inappropriate [OE Specific]
+Upstream-Status: Inappropriate [musl Specific]
 
 Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
 ---
@@ -16,18 +16,18 @@
  1 file changed, 2 deletions(-)
 
 diff --git a/meson.build b/meson.build
-index 7610ab12b..591b9cbab 100644
+index f432ea072..a734a295c 100644
 --- a/meson.build
 +++ b/meson.build
-@@ -329,8 +329,6 @@ foreach arg : ['-Wextra',
-                '-fdiagnostics-show-option',
-                '-fno-strict-aliasing',
-                '-fvisibility=hidden',
--               '-fstack-protector',
--               '-fstack-protector-strong',
-                '--param=ssp-buffer-size=4',
-               ]
-         if cc.has_argument(arg)
+@@ -333,8 +333,6 @@ possible_cc_flags = [
+         '-fdiagnostics-show-option',
+         '-fno-strict-aliasing',
+         '-fvisibility=hidden',
+-        '-fstack-protector',
+-        '-fstack-protector-strong',
+         '--param=ssp-buffer-size=4',
+ ]
+ 
 -- 
-2.13.0
+2.11.0