meta-google: dunfell: add support for new layer

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I0369aeb6b6ef7f3502aa66c253c7973e20a808ed
diff --git a/conf/layer.conf b/conf/layer.conf
index 982339c..03f9c68 100644
--- a/conf/layer.conf
+++ b/conf/layer.conf
@@ -7,4 +7,4 @@
 BBFILE_COLLECTIONS += "google-layer"
 BBFILE_PATTERN_google-layer := "^${LAYERDIR}/"
 LAYERVERSION_google-layer = "1"
-LAYERSERIES_COMPAT_google-layer = "warrior zeus"
+LAYERSERIES_COMPAT_google-layer = "warrior zeus dunfell"