A+C: add Jed Denlea (Fastly corporate CLA)

LGTM=iant
R=golang-codereviews, iant
CC=adg, golang-codereviews
https://codereview.appspot.com/165170043
A+C: Nathan P Finch (individual CLA)

TBR=iant
R=iant
CC=golang-codereviews
https://codereview.appspot.com/155560045
cmd/go: fix minor typo

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://codereview.appspot.com/170770043

Committer: Brad Fitzpatrick <bradfitz@golang.org>