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-raspberrypi/recipes-graphics/userland/files/0013-Implement-triple-buffering-for-wayland.patch b/meta-raspberrypi/recipes-graphics/userland/files/0013-Implement-triple-buffering-for-wayland.patch
index 3052168..5197856 100644
--- a/meta-raspberrypi/recipes-graphics/userland/files/0013-Implement-triple-buffering-for-wayland.patch
+++ b/meta-raspberrypi/recipes-graphics/userland/files/0013-Implement-triple-buffering-for-wayland.patch
@@ -1,4 +1,4 @@
-From 65f8bca55aead676cd06fc3210aeffef1f2158c6 Mon Sep 17 00:00:00 2001
+From e99b2eafba5260b8087fc1a85830b08ea3228292 Mon Sep 17 00:00:00 2001
 From: Jeff Wannamaker <jeff_wannamaker@cable.comcast.com>
 Date: Thu, 19 Jan 2017 18:56:07 +0000
 Subject: [PATCH 13/18] Implement triple buffering for wayland
@@ -86,5 +86,5 @@
        back_wl_buffer
  
 -- 
-2.19.1
+2.20.1