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-python/README b/meta-openembedded/meta-python/README
index 9c10c78..705b035 100644
--- a/meta-openembedded/meta-python/README
+++ b/meta-openembedded/meta-python/README
@@ -13,12 +13,12 @@
 
 	URI: git://git.openembedded.org/openembedded-core
 	layers: meta
-	branch: thud
+	branch: master
 	revision: HEAD
 
 	URI: git://git.openembedded.org/meta-openembedded
 	layers: meta-oe
-	branch: thud
+	branch: master
 	revision: HEAD
 
 Please follow the recommended setup procedures of your OE distribution.
@@ -35,13 +35,15 @@
 before posting.
 
 Send pull requests to openembedded-devel@lists.openembedded.org with
-'[meta-python][thud]' in the subject.
+'[meta-python]' 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-python][thud][PATCH'
+'git send-email -M -1 --to=openembedded-devel@lists.openembedded.org --subject-prefix=meta-python][PATCH'
 
 Maintenance
 -------------------------
 
-Thud Maintainers: Armin Kuster <akuster808@gmail.com>
+Layer Maintainers:
+        Tim "moto-timo" Orling <TicoTimo@gmail.com>
+        Derek Straka <derek@asterius.io>