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/README b/meta-openembedded/README
index a716801..7318f09 100644
--- a/meta-openembedded/README
+++ b/meta-openembedded/README
@@ -1,6 +1,6 @@
 Collection of layers for the OE-core universe
 
-Thud maintainer: Armin Kuster  <akuster808@gmail.com>
+Main layer maintainer: Khem Raj <raj.khem@gmail.com>
 
 This repository is a collection of layers to suppliment OE-Core
 with additional packages, Each layer have designated maintainer