Add conf/layer.conf

The layer.conf is a required config file to describe the
bytedance-layer.

Signed-off-by: Lei YU <yulei.sh@bytedance.com>
Change-Id: If2d234a61e31a724826cf2ee075a614b62d2247c
diff --git a/conf/layer.conf b/conf/layer.conf
new file mode 100644
index 0000000..6fa8da7
--- /dev/null
+++ b/conf/layer.conf
@@ -0,0 +1,10 @@
+# We have a conf and classes directory, add to BBPATH
+BBPATH .= ":${LAYERDIR}"
+
+# We have recipes-* directories, add to BBFILES
+BBFILES += "${LAYERDIR}/recipes-*/*/*.bb \
+            ${LAYERDIR}/recipes-*/*/*.bbappend"
+
+BBFILE_COLLECTIONS += "bytedance-layer"
+BBFILE_PATTERN_bytedance-layer = "^${LAYERDIR}/"
+LAYERSERIES_COMPAT_bytedance-layer = "dunfell"