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/lib/bblayers/templates/README b/poky/meta/lib/bblayers/templates/README
index 5a77f8d..fb2d28e 100644
--- a/poky/meta/lib/bblayers/templates/README
+++ b/poky/meta/lib/bblayers/templates/README
@@ -1,4 +1,4 @@
-This README file contains information on the contents of the %s layer.
+This README file contains information on the contents of the {layername} layer.
 
 Please see the corresponding sections below for details.
 
@@ -18,7 +18,7 @@
 Patches
 =======
 
-Please submit any patches against the %s layer to the xxxx mailing list (xxxx@zzzz.org)
+Please submit any patches against the {layername} layer to the xxxx mailing list (xxxx@zzzz.org)
 and cc: the maintainer:
 
 Maintainer: XXX YYYYYY <xxx.yyyyyy@zzzzz.com>
@@ -26,16 +26,16 @@
 Table of Contents
 =================
 
-  I. Adding the %s layer to your build
+  I. Adding the {layername} layer to your build
  II. Misc
 
 
-I. Adding the %s layer to your build
+I. Adding the {layername} layer to your build
 =================================================
 
-Run 'bitbake-layers add-layer %s'
+Run 'bitbake-layers add-layer {layername}'
 
 II. Misc
 ========
 
---- replace with specific information about the %s layer ---
+--- replace with specific information about the {layername} layer ---