A+C: David Leon Gil (individual CLA)

Generated by a+c.

R=gobot
CC=golang-codereviews
https://codereview.appspot.com/134330043
crypto: Add SHA3 functions in go.crypto/sha3 to the Hash enum.

Reverse dependency of https://codereview.appspot.com/130950043/

LGTM=agl
R=golang-codereviews, agl
CC=agl, golang-codereviews
https://codereview.appspot.com/138800043

Committer: Adam Langley <agl@golang.org>