Updates golang/go#27376.

Change-Id: Ia8608561eb6a268aa7eae8c39c7098df100b643a
Reviewed-on: https://go-review.googlesource.com/133075Reviewed-by: Kevin Burke <kev@inburke.com>
Run-TryBot: Kevin Burke <kev@inburke.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>