review: add flags for upload, including -r and -cc
review: add flags for upload, including -r and -cc

Change-Id: I01590867ff89dc49e9d3401a68c88ada9ac75192
Reviewed-on: https://go-review.googlesource.com/1082
Reviewed-by: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>

Go-zh/review,golang/review