Add license headers and .gitreview file

Change-Id: Ia658a979c73175948944d249641e455cdb90c2a8
diff --git a/protos/scripts/build_protos.sh b/protos/scripts/build_protos.sh
index faac725..0b2e17a 100644
--- a/protos/scripts/build_protos.sh
+++ b/protos/scripts/build_protos.sh
@@ -1,5 +1,19 @@
 #!/bin/sh
 
+# Copyright 2018 the original author or authors.
+#
+# 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.
+
 export SRC_DIR="$1"
 
 echo $SRC_DIR