Fix gradle builds of libprotobuf-lite.
Fix gradle builds of libprotobuf-lite.

Change-Id: I23f6ce1245e30624dafa102257e9cb6d6cf38af8
TODO: Move this into AOSP.

geekboxzone/mmallow_external_protobuf,MonkeyZZZZ/platform_external_protobuf,MonkeyZZZZ/platform_external_protobuf,geekboxzone/mmallow_external_protobuf,geekboxzone/mmallow_external_protobuf,MonkeyZZZZ/platform_external_protobuf,geekboxzone/mmallow_external_protobuf,MonkeyZZZZ/platform_external_protobuf,geekboxzone/mmallow_external_protobuf,MonkeyZZZZ/platform_external_protobuf