Added Copyright Header

Reviewed By: davidaurelio

Differential Revision: D10462700

fbshipit-source-id: edef1f6f5825835bbdb613a1934bf7bfe86d0ee6

gradle.properties

@@ -1,3 +1,10 @@
+#
+#  Copyright (c) Facebook, Inc. and its affiliates.
+#
+#  This source code is licensed under the MIT license found in the LICENSE
+#  file in the root directory of this source tree.
+#
+
 # Project-wide Gradle settings.
 
 org.gradle.jvmargs=-Xmx1536M