build: break builds
build: break builds

I want to see the timing information in build logs,
and we can't see the logs for "ok" builds.
So make the build fail everywhere.

Will roll back immediately.

TBR=dvyukov
CC=golang-dev
https://codereview.appspot.com/12058046

wesolows/golang-old,wesolows/golang-old,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang-old,wesolows/golang,wesolows/golang,firebitsbr/golang-old,wesolows/golang-old,firebitsbr/golang-old,firebitsbr/golang-old,wesolows/golang,firebitsbr/golang-old,wesolows/golang,firebitsbr/golang-old,wesolows/golang,wesolows/golang-old,wesolows/golang,firebitsbr/golang-old