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-security/README b/meta-security/README
index e238271..5abb0e2 100644
--- a/meta-security/README
+++ b/meta-security/README
@@ -57,8 +57,14 @@
 When sending single patches, please using something like:
 'git send-email -1 --to yocto@yoctoproject.org --subject-prefix=meta-security][PATCH'
 
+These values can be set as defaults for this repository:
+
+$ git config sendemail.to yocto@yoctoproject.org
+$ git config format.subjectPrefix meta-security][PATCH
+
+Now you can just do 'git send-email origin/master' to send all local patches.
+
 Maintainers:    Armin Kuster <akuster808@gmail.com>
-                Saul Wold <sgw@linux.intel.com>
 
 
 License