Enable auto-building protobufs
Enable auto-building protobufs

Summary:
Added configs to the pom.xml to enable protoc to recompile the protobuf
file at compile time.

Test Plan:
Built, verified the date on the generated file was updated.

electrum/hive-dwrf,skinzer/hive-dwrf,facebook/hive-dwrf,facebookarchive/hive-dwrf