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-poky/conf/distro/poky-lsb.conf b/poky/meta-poky/conf/distro/poky-lsb.conf
index 1c426ba..5c7e272 100644
--- a/poky/meta-poky/conf/distro/poky-lsb.conf
+++ b/poky/meta-poky/conf/distro/poky-lsb.conf
@@ -11,4 +11,4 @@
 KERNEL_FEATURES_append_pn-linux-yocto = " features/nfsd/nfsd-enable.scc"
 
 # Use the LTSI Kernel for LSB Testing
-PREFERRED_VERSION_linux-yocto_linuxstdbase ?= "4.14%"
+PREFERRED_VERSION_linux-yocto_linuxstdbase ?= "4.19%"