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/classes/compress_doc.bbclass b/poky/meta/classes/compress_doc.bbclass
index 45bb8ff..d6d11fa 100644
--- a/poky/meta/classes/compress_doc.bbclass
+++ b/poky/meta/classes/compress_doc.bbclass
@@ -160,6 +160,7 @@
     return False, ''
 
 def compress_doc(topdir, compress_mode, compress_cmds):
+    import subprocess
     hardlink_dict = {}
     for root, dirs, files in os.walk(topdir):
         for f in files:
@@ -187,6 +188,7 @@
 
 # Decompress doc files which format is not compress_mode
 def decompress_doc(topdir, compress_mode, decompress_cmds):
+    import subprocess
     hardlink_dict = {}
     decompress = True
     for root, dirs, files in os.walk(topdir):