goprotobuf: Update .hgtags.
goprotobuf: Update .hgtags.

Point go.r60 at tip, and add weekly.2011-09-21.

R=adg, r
CC=golang-dev
http://codereview.appspot.com/5150045

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