meta-oran: add missing license header

Issue-ID: INF-4
Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Change-Id: I48be4510729f25a0c7f28e4c28f55af31c9381db
diff --git a/meta-oran/conf/layer.conf b/meta-oran/conf/layer.conf
index 92c091a..3c7b8ad 100644
--- a/meta-oran/conf/layer.conf
+++ b/meta-oran/conf/layer.conf
@@ -1,6 +1,17 @@
 #
 # Copyright (C) 2019 Wind River Systems, Inc.
 #
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
 
 # We have a conf and classes directory, add to BBPATH
 BBPATH =. "${LAYERDIR}:"