[ReactNative] Expanded license on js packager files

packager/react-packager/example_project/public/css/index.css

@@ -1,3 +1,13 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+
 html {
   font-family: sans-serif;
 }