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-perl/README b/meta-openembedded/meta-perl/README
index 67f2910..3c787f4 100644
--- a/meta-openembedded/meta-perl/README
+++ b/meta-openembedded/meta-perl/README
@@ -52,7 +52,7 @@
 This layer depends on:
 
   URI: git://git.openembedded.org/openembedded-core
-  branch: master
+  branch: thud
   revision: HEAD
   prio: default
 
@@ -75,14 +75,12 @@
 -----------
 
 Send patches / pull requests to openembedded-devel@lists.openembedded.org with
-'[meta-perl]' in the subject.
+'[meta-perl][thud]' in the subject.
 
 When sending single patches, please using something like:
-'git send-email -M -1 --to openembedded-devel@lists.openembedded.org --subject-prefix=meta-perl][PATCH'
+'git send-email -M -1 --to openembedded-devel@lists.openembedded.org --subject-prefix=meta-perl][thud][PATCH'
 
-Layer maintainers:
-    Hongxu Jia <hongxu.jia@windriver.com>
-    Tim "moto-timo" Orling <ticotimo@gmail.com>
+Thud maintainers: Armin kuster <akuster808@gmail.com>
 
 License
 -------