cmd/go: fix build (piece of 5489100 leaked in to last checkin)
cmd/go: fix build (piece of 5489100 leaked in to last checkin)

TBR=golang-dev
CC=golang-dev
http://codereview.appspot.com/5489102
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go