Forgot to git mail after https://golang.org/cl/18721

Change-Id: Ie5e2ad91e7580d5283b19b68491fd10978fa2488
Reviewed-on: https://go-review.googlesource.com/18722
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>