cmd/watcher: add -report flag for development

Defaults to true (same as before), but now you can run it in just
git-updating mode.

Change-Id: I228a0ec44117dd5a38bff95234556534b4a8a6b8
Reviewed-on: https://go-review.googlesource.com/14580
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
1 file changed