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/poky/meta/conf/machine/qemux86-64.conf b/poky/meta/conf/machine/qemux86-64.conf
index 9966d1a..383e3bd 100644
--- a/poky/meta/conf/machine/qemux86-64.conf
+++ b/poky/meta/conf/machine/qemux86-64.conf
@@ -1,6 +1,6 @@
 #@TYPE: Machine
-#@NAME: common_pc
-#@DESCRIPTION: Machine configuration for running a common x86
+#@NAME: QEMU x86-64 machine
+#@DESCRIPTION: Machine configuration for running an x86-64 system on QEMU
 
 PREFERRED_PROVIDER_virtual/xserver ?= "xserver-xorg"
 PREFERRED_PROVIDER_virtual/libgl ?= "mesa"