goprotobuf: Update .hgtags to cover the latest bug fixes.

R=adg, rsc
CC=golang-dev
http://codereview.appspot.com/5079047

.hgtags

@@ -12,5 +12,5 @@ fa1080cfc0a4d0fa24844bc50124aed892365059 release.r57.2
 cfe37a63cede6cd072434965e6ea426b90bcb223 release.r58
 cfe37a63cede6cd072434965e6ea426b90bcb223 release.r58.1
 da17c98c73d8801baa1d2e493c9ac0844470ef0a release.r59
-f1f9e5a4fdf0560ca8c5067fffb70be3f38de6d1 go.r60
-f1f9e5a4fdf0560ca8c5067fffb70be3f38de6d1 go.weekly.2011-09-07
+5a487ccac6f7fd6cba5deee5d5d0908c7f1d6a53 go.r60
+5a487ccac6f7fd6cba5deee5d5d0908c7f1d6a53 go.weekly.2011-09-07