goprotobuf: Move along .hgtags.
goprotobuf: Move along .hgtags.

TBR=adg
CC=golang-dev
http://codereview.appspot.com/5180046

hailocab/protobuf,fuchsia-mirror/third_party-github.com-golang-protobuf,golang/protobuf,kung-foo/protobuf,francoishill/protobuf,golang/protobuf,velocity-toolkit/protobuf-1,ArtemTeleshev/go-protobuf,qinlodestar/protobuf,eduardiazf/protobuf,daemonl/protobuf,trdata/protobuf,alskjstl/protobuf,linkedin-inc/protobuf,tamird/protobuf-2,trdata/protobuf,aoeu/protobuf,jeremyletang/protobuf,mwitkow-io/protobuf,jmptrader/protobuf-1,tamird/protobuf-2,ekle/protoc-gen-goweb_test,skyportsystems/go-protobuf,ekle/protoc-gen-goweb,fuchsia-mirror/third_party-github.com-golang-protobuf,jrbarron/protobuf,skyportsystems/go-protobuf,adnaan/protobuf,csuideal/protobuf