Fix BUILD of protobuf: - protoc should be listed as tools - generated java code should be put into srcs instead of deps.
Fix BUILD of protobuf:
- protoc should be listed as tools
- generated java code should be put into srcs instead of deps.

duanguoxue/trunk,duanguoxue/trunk,bazelment/trunk,bazelment/trunk,mzhaom/trunk,mzhaom/trunk,duanguoxue/trunk,bazelment/trunk,mzhaom/trunk,bazelment/trunk