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/meta-openembedded/meta-oe/recipes-support/links/files/ac-prog-cxx.patch b/meta-openembedded/meta-oe/recipes-support/links/files/ac-prog-cxx.patch
index 41c3826..2dc57a5 100644
--- a/meta-openembedded/meta-oe/recipes-support/links/files/ac-prog-cxx.patch
+++ b/meta-openembedded/meta-oe/recipes-support/links/files/ac-prog-cxx.patch
@@ -1,11 +1,21 @@
---- links-2.1pre20/configure.in.orig	2005-12-21 15:23:49.000000000 +0000
-+++ links-2.1pre20/configure.in	2005-12-21 15:23:59.000000000 +0000
-@@ -18,7 +18,7 @@
+From c00668541f68c17a5e453a4dcc2a86022b20af87 Mon Sep 17 00:00:00 2001
+From: Martin Jansa <Martin.Jansa@gmail.com>
+Date: Mon, 30 Jul 2012 23:52:49 +0200
+
+---
+ configure.in | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/configure.in b/configure.in
+index 7c15b6b..9896631 100644
+--- a/configure.in
++++ b/configure.in
+@@ -23,7 +23,7 @@ AM_CONFIG_HEADER(config.h)
  dnl Checks for programs.
  AC_PROG_CC
  
--#AC_PROG_CXX
+-dnl AC_PROG_CXX
 +AC_PROG_CXX
- #AC_PROG_AWK
- #AM_PROG_LEX
- #AC_PROG_YACC
+ dnl AC_PROG_AWK
+ dnl AM_PROG_LEX
+ dnl AC_PROG_YACC