SINGA-244 Separating swig interface and python binding files Remove dependencies on copy_protobuf target.
SINGA-244 Separating swig interface and python binding files
Remove dependencies on copy_protobuf target.

kaiping/incubator-singa,ijingo/incubator-singa,nudles/incubator-singa,kaiping/incubator-singa,ijingo/incubator-singa,nudles/incubator-singa,wangsheng1001/incubator-singa,wangsheng1001/incubator-singa,wangsheng1001/incubator-singa,wangsheng1001/incubator-singa,kaiping/incubator-singa,nudles/incubator-singa,apache/incubator-singa,nusdbsystem/incubator-singa,apache/incubator-singa,nusdbsystem/incubator-singa,wangsheng1001/incubator-singa,ijingo/incubator-singa,kaiping/incubator-singa,nusdbsystem/incubator-singa,apache/incubator-singa,ijingo/incubator-singa,nudles/incubator-singa,apache/incubator-singa,nudles/incubator-singa,ijingo/incubator-singa,nusdbsystem/incubator-singa,apache/incubator-singa,nusdbsystem/incubator-singa,kaiping/incubator-singa