crypto/sha1: mark block as non-escaping The compiler still gets the escape analysis wrong, but the annotation here is correct.
crypto/sha1: mark block as non-escaping
The compiler still gets the escape analysis wrong, but the annotation here is correct.

R=golang-dev, dave, bradfitz
CC=golang-dev
https://codereview.appspot.com/10514046

wesolows/golang,firebitsbr/golang-old,firebitsbr/golang-old,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang-old,wesolows/golang-old,wesolows/golang,wesolows/golang-old,firebitsbr/golang-old,firebitsbr/golang-old,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang-old,wesolows/golang,wesolows/golang,wesolows/golang,wesolows/golang-old,firebitsbr/golang-old,wesolows/golang,firebitsbr/golang-old,wesolows/golang