goprotobuf: tag weekly

R=dsymonds
CC=golang-dev
http://codereview.appspot.com/5649078

.hgtags

@@ -19,3 +19,5 @@ a13c0e6343c49dc738c218ea43cab675865136dc go.weekly.2011-10-26
 694312d6c9bb86513f52e38db02c2d0f84b181ce go.weekly.2011-11-02
 458bd32e66bc173c6c12743d375dfa20b145a31f go.weekly.2011-11-09
 baa3174c862d6d0b5a44044c385736f633e10a85 go.weekly.2011-12-06
+be6d136a075ad78f0ec0348dd6056f57dc08b8b7 go.weekly.2012-02-07
+be6d136a075ad78f0ec0348dd6056f57dc08b8b7 weekly