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-gnome/gtk-doc/files/no-clobber.patch b/poky/meta/recipes-gnome/gtk-doc/files/no-clobber.patch
index 0fa22b2..d169547 100644
--- a/poky/meta/recipes-gnome/gtk-doc/files/no-clobber.patch
+++ b/poky/meta/recipes-gnome/gtk-doc/files/no-clobber.patch
@@ -1,3 +1,8 @@
+From 8bc4c1f169f89bc5531da5b7e892b8f20e0f9a18 Mon Sep 17 00:00:00 2001
+From: Ross Burton <ross.burton@intel.com>
+Date: Wed, 21 Mar 2018 14:47:29 +0000
+Subject: [PATCH] gtk-doc: don't regenerate gtk-doc in do_install
+
 In out-of-tree builds gtk-doc's setup-build target copies all the content from $srcdir to $builddir.
 
 However, if some of this content is regenerated at configure time this can happen:
@@ -16,12 +21,20 @@
 Upstream-Status: Submitted [https://bugzilla.gnome.org/show_bug.cgi?id=794571]
 Signed-off-by: Ross Burton <ross.burton@intel.com>
 
-diff --git a/gtk-doc.make b/gtk-doc.make
-index f87eaab..246f3c0 100644
---- a/gtk-doc.make
-+++ b/gtk-doc.make
-@@ -113,3 +113,3 @@ setup-build.stamp:
+---
+ buildsystems/autotools/gtk-doc.make | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/buildsystems/autotools/gtk-doc.make b/buildsystems/autotools/gtk-doc.make
+index 7d9a27f..8cb336d 100644
+--- a/buildsystems/autotools/gtk-doc.make
++++ b/buildsystems/autotools/gtk-doc.make
+@@ -111,7 +111,7 @@ setup-build.stamp:
+ 	      destdir=`dirname $(abs_builddir)/$$file`; \
+ 	      test -d "$$destdir" || mkdir -p "$$destdir"; \
  	      test -f $(abs_srcdir)/$$file && \
 -	        cp -pf $(abs_srcdir)/$$file $(abs_builddir)/$$file || true; \
 +	        cp -pn $(abs_srcdir)/$$file $(abs_builddir)/$$file || true; \
  	    done; \
+ 	  fi; \
+ 	fi