meta-facebook: prep for new override syntax

Ran `scripts/contrib/convert-overrides.py` from upstream Yocto and
fixed up a few by hand that were missed.

Tested: Built bletchley and tiogapass.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I0489ba007132901697e4ef1a29b03a3591b3ee3b
diff --git a/meta-facebook/conf/layer.conf b/meta-facebook/conf/layer.conf
index c0ca08f..a22a085 100644
--- a/meta-facebook/conf/layer.conf
+++ b/meta-facebook/conf/layer.conf
@@ -6,5 +6,5 @@
             ${LAYERDIR}/recipes-*/*/*.bbappend"
 
 BBFILE_COLLECTIONS += "facebook-layer"
-BBFILE_PATTERN_facebook-layer := "^${LAYERDIR}/"
-LAYERSERIES_COMPAT_facebook-layer := "gatesgarth hardknott"
+BBFILE_PATTERN:facebook-layer := "^${LAYERDIR}/"
+LAYERSERIES_COMPAT:facebook-layer := "gatesgarth hardknott"