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/elfutils/files/0001-dso-link-change.patch b/poky/meta/recipes-devtools/elfutils/files/0001-dso-link-change.patch
index 28c57f2..4c62dc5 100644
--- a/poky/meta/recipes-devtools/elfutils/files/0001-dso-link-change.patch
+++ b/poky/meta/recipes-devtools/elfutils/files/0001-dso-link-change.patch
@@ -1,4 +1,4 @@
-From 0a69a26c9f7487daca900db87cd1195857a4603f Mon Sep 17 00:00:00 2001
+From c9c6d2414651dbf163dc4963c3c3d6f5cacef898 Mon Sep 17 00:00:00 2001
 From: Hongxu Jia <hongxu.jia@windriver.com>
 Date: Tue, 15 Aug 2017 17:10:57 +0800
 Subject: [PATCH 1/7] dso link change
@@ -35,10 +35,10 @@
  endif
  libebl = ../libebl/libebl.a
 diff --git a/tests/Makefile.am b/tests/Makefile.am
-index 3735084..528615d 100644
+index b45ecdc..dd256fb 100644
 --- a/tests/Makefile.am
 +++ b/tests/Makefile.am
-@@ -400,7 +400,7 @@ libdw = ../libdw/libdw.a -lz $(zip_LIBS) $(libelf) $(libebl) -ldl
+@@ -436,7 +436,7 @@ libdw = ../libdw/libdw.a -lz $(zip_LIBS) $(libelf) $(libebl) -ldl
  libelf = ../libelf/libelf.a -lz
  libasm = ../libasm/libasm.a
  else
@@ -48,5 +48,5 @@
  libasm = ../libasm/libasm.so
  endif
 -- 
-1.8.3.1
+2.7.4