Enable libyaml nativesdk bake

Short term workaround pending upstream review:

https://patchwork.openembedded.org/patch/133722/

Change-Id: Ice579d23340ba82898c51f92740d21a24fb91fa7
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/common/recipes-support/libyaml/libyaml_%.bbappend b/common/recipes-support/libyaml/libyaml_%.bbappend
new file mode 100644
index 0000000..2a59083
--- /dev/null
+++ b/common/recipes-support/libyaml/libyaml_%.bbappend
@@ -0,0 +1 @@
+BBCLASSEXTEND += "nativesdk"