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-filesystems/README b/meta-openembedded/meta-filesystems/README
index 97d0e94..ac0035a 100644
--- a/meta-openembedded/meta-filesystems/README
+++ b/meta-openembedded/meta-filesystems/README
@@ -10,30 +10,30 @@
 This layer depends on:
 
   URI: git://git.openembedded.org/bitbake
-  branch: master
+  branch: 1.40
 
   URI: git://git.openembedded.org/openembedded-core
   layers: meta
-  branch: master
+  branch: thud
 
   URI: git://git.openembedded.org/meta-openembedded
   layers: meta-oe
-  branch: master
+  branch: thud
 
 Patches
 =======
 
 Please submit any patches against the filesystems layer to the
 OpenEmbedded development mailing list (openembedded-devel@lists.openembedded.org)
-with '[meta-filesystems]' in the subject.
+with '[meta-filesystems][thud]' in the subject.
 
-Layer maintainer: Armin Kuster <akuster808@gmail.com>
+Thud maintainer: Armin Kuster <akuster808@gmail.com>
 
 When sending single patches, please use something like:
 
    git send-email -1 -M \
         --to openembedded-devel@lists.openembedded.org \
-        --subject-prefix=meta-filesystems][PATCH
+        --subject-prefix=meta-filesystems][thud][PATCH
 
 
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