Fix go generate for protobuf
Fix go generate for protobuf

Signed-off-by: Santhosh Manohar <0806b0927a65802677e1bc58a740a42f957953d7@docker.com>

abhi/libnetwork,kolyshkin/libnetwork,vdemeester/libnetwork,kolyshkin/libnetwork,medallia/libnetwork,vdemeester/libnetwork,mahak/libnetwork,fcrisciani/libnetwork,mahak/libnetwork,allencloud/libnetwork,medallia/libnetwork,abhi/libnetwork,vdemeester/libnetwork,docker/libnetwork,abhi/libnetwork,docker/libnetwork,fcrisciani/libnetwork,docker/libnetwork,allencloud/libnetwork,kolyshkin/libnetwork,mahak/libnetwork,medallia/libnetwork,ityangchen/libnetwork,ityangchen/libnetwork