[release-branch.go1.11] go1.11.8
Change-Id: Ie15c45050f817213b3f5955dc98b48a6cf2a6317
Reviewed-on: https://go-review.googlesource.com/c/go/+/171148
Run-TryBot: Andrew Bonventre <andybons@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>