add langdale to compatible layer

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I65febeeec11e6e5b40ee728f42cfbe77023dae1e
diff --git a/meta-facebook/meta-greatlakes/conf/layer.conf b/meta-facebook/meta-greatlakes/conf/layer.conf
index abee71c..40d0f10 100644
--- a/meta-facebook/meta-greatlakes/conf/layer.conf
+++ b/meta-facebook/meta-greatlakes/conf/layer.conf
@@ -8,4 +8,4 @@
 BBFILE_COLLECTIONS += "greatlakes-layer"
 BBFILE_PATTERN_greatlakes-layer := "^${LAYERDIR}/"
 
-LAYERSERIES_COMPAT_greatlakes-layer := "honister kirkstone"
+LAYERSERIES_COMPAT_greatlakes-layer := "kirkstone langdale"