Yocto 2.4

Move OpenBMC to Yocto 2.4(rocko)

Tested: Built and verified Witherspoon and Palmetto images
Change-Id: I12057b18610d6fb0e6903c60213690301e9b0c67
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/import-layers/meta-virtualization/conf/layer.conf b/import-layers/meta-virtualization/conf/layer.conf
index be08a98..f71c117 100644
--- a/import-layers/meta-virtualization/conf/layer.conf
+++ b/import-layers/meta-virtualization/conf/layer.conf
@@ -22,3 +22,7 @@
 
 PREFERRED_PROVIDER_virtual/runc ?= "runc-docker"
 PREFERRED_PROVIDER_virtual/containerd ?= "containerd-docker"
+
+# Sanity check for meta-virtualization layer.
+# Setting SKIP_META_VIRT_SANITY_CHECK to "1" would skip the bbappend files check.
+INHERIT += "sanity-meta-virt"