reset upstream subtrees to HEAD

Reset the following subtrees on HEAD:
  poky: 8217b477a1(master)
  meta-xilinx: 64aa3d35ae(master)
  meta-openembedded: 0435c9e193(master)
  meta-raspberrypi: 490a4441ac(master)
  meta-security: cb6d1c85ee(master)

Squashed patches:
  meta-phosphor: drop systemd 239 patches
  meta-phosphor: mrw-api: use correct install path

Change-Id: I268e2646d9174ad305630c6bbd3fbc1a6105f43d
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-openembedded/meta-oe/README b/meta-openembedded/meta-oe/README
index de351f2..0e9f842 100644
--- a/meta-openembedded/meta-oe/README
+++ b/meta-openembedded/meta-oe/README
@@ -4,13 +4,13 @@
 This layer depends on:
 
 URI: git://github.com/openembedded/openembedded-core.git
-branch: thud 
+branch: master
 revision: HEAD
 
-Send pull requests to openembedded-devel@lists.openembedded.org with '[meta-oe][thud]' in the subject'
+Send pull requests to openembedded-devel@lists.openembedded.org with '[meta-oe]' in the subject'
 
 When sending single patches, please use something like:
-'git send-email -M -1 --to openembedded-devel@lists.openembedded.org --subject-prefix=meta-oe[thud][PATCH'
+'git send-email -M -1 --to openembedded-devel@lists.openembedded.org --subject-prefix=meta-oe][PATCH'
 
 You are encouraged to fork the mirror on GitHub https://github.com/openembedded/openembedded-core
 to share your patches, this is preferred for patch sets consisting of more than one patch.
@@ -19,4 +19,4 @@
 'git fetch <remote>' works the same on all of them. We recommend GitHub because it is free, easy
 to use, has been proven to be reliable and has a really good web GUI.
 
-Thud maintainer: Armin Kuster <akuster808@gmail.com>
+layer maintainer: Khem Raj <raj.khem@gmail.com>