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-extended/ghostscript/files/do-not-check-local-libpng-source.patch b/poky/meta/recipes-extended/ghostscript/files/do-not-check-local-libpng-source.patch
index c3e44fe..5834ffa 100644
--- a/poky/meta/recipes-extended/ghostscript/files/do-not-check-local-libpng-source.patch
+++ b/poky/meta/recipes-extended/ghostscript/files/do-not-check-local-libpng-source.patch
@@ -1,7 +1,7 @@
-From 5ef8b85bc98f3bd9a15d5f47e24d3e23ae27c265 Mon Sep 17 00:00:00 2001
+From a954bf29a5f906b3151dffbecb5856e02e1565da Mon Sep 17 00:00:00 2001
 From: Hongxu Jia <hongxu.jia@windriver.com>
 Date: Mon, 18 Jan 2016 01:00:30 -0500
-Subject: [PATCH] configure.ac: do not check local png source
+Subject: [PATCH 03/10] configure.ac: do not check local png source
 
 In oe-core, it did not need to compile local libpng
 source in ghostscript, so do not check local png
@@ -16,10 +16,10 @@
  1 file changed, 2 insertions(+), 2 deletions(-)
 
 diff --git a/configure.ac b/configure.ac
-index bf6d3f5..01df03f 100644
+index 9341930..80a60b1 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -930,11 +930,11 @@ AC_SUBST(ZLIBDIR)
+@@ -1114,11 +1114,11 @@ AC_SUBST(ZLIBDIR)
  AC_SUBST(FT_SYS_ZLIB)
  
  dnl png for the png output device; it also requires zlib
@@ -34,5 +34,5 @@
          SHARE_LIBPNG=0
          LIBPNGDIR=$srcdir/libpng
 -- 
-2.8.1
+1.8.3.1