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-devtools/meson/meson/0002-Make-CPU-family-warnings-fatal.patch b/poky/meta/recipes-devtools/meson/meson/0002-Make-CPU-family-warnings-fatal.patch
new file mode 100644
index 0000000..ca56a6a
--- /dev/null
+++ b/poky/meta/recipes-devtools/meson/meson/0002-Make-CPU-family-warnings-fatal.patch
@@ -0,0 +1,36 @@
+From 2e8553fc01e62ebc4faa240bf20984a8a0ac7387 Mon Sep 17 00:00:00 2001
+From: Ross Burton <ross.burton@intel.com>
+Date: Tue, 3 Jul 2018 13:59:09 +0100
+Subject: [PATCH] Make CPU family warnings fatal
+
+Upstream-Status: Inappropriate [OE specific]
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+---
+ mesonbuild/environment.py | 6 ++----
+ 1 file changed, 2 insertions(+), 4 deletions(-)
+
+diff --git a/mesonbuild/environment.py b/mesonbuild/environment.py
+index d29a77f..267acf9 100644
+--- a/mesonbuild/environment.py
++++ b/mesonbuild/environment.py
+@@ -239,9 +239,7 @@ def detect_cpu_family(compilers):
+         return 'x86_64'
+ 
+     if trial not in known_cpu_families:
+-        mlog.warning('Unknown CPU family {!r}, please report this at '
+-                     'https://github.com/mesonbuild/meson/issues/new with the'
+-                     'output of `uname -a` and `cat /proc/cpuinfo`'.format(trial))
++        raise EnvironmentException('Unknown CPU family %s, see https://wiki.yoctoproject.org/wiki/Meson/UnknownCPU for directions.' % trial)
+ 
+     return trial
+ 
+@@ -1014,7 +1012,7 @@ class CrossBuildInfo:
+                     raise EnvironmentException('Malformed value in cross file variable %s.' % entry)
+ 
+                 if entry == 'cpu_family' and res not in known_cpu_families:
+-                    mlog.warning('Unknown CPU family %s, please report this at https://github.com/mesonbuild/meson/issues/new' % value)
++                    raise EnvironmentException('Unknown CPU family %s, see https://wiki.yoctoproject.org/wiki/Meson/UnknownCPU for directions.' % value)
+ 
+                 if self.ok_type(res):
+                     self.config[s][entry] = res