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/python3-dir.bbclass b/poky/meta/classes/python3-dir.bbclass
index 06bb046..7dd130b 100644
--- a/poky/meta/classes/python3-dir.bbclass
+++ b/poky/meta/classes/python3-dir.bbclass
@@ -1,4 +1,4 @@
-PYTHON_BASEVERSION = "3.5"
+PYTHON_BASEVERSION = "3.7"
 PYTHON_ABI = "m"
 PYTHON_DIR = "python${PYTHON_BASEVERSION}"
 PYTHON_PN = "python3"