Added Copyright Header

Reviewed By: davidaurelio

Differential Revision: D10462700

fbshipit-source-id: edef1f6f5825835bbdb613a1934bf7bfe86d0ee6

yogacore/build.gradle

@@ -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.
+ */
+
 apply plugin: 'com.android.library'
 
 android {