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

apparentlymart/golang,apparentlymart/golang,tv42/old-go,gnanderson/go,gnanderson/go,pombredanne/go-deleteme,gnanderson/go,apparentlymart/golang,gnanderson/go,tv42/old-go,pombredanne/go-deleteme,tv42/old-go,tv42/old-go,apparentlymart/golang,pombredanne/go-deleteme,apparentlymart/golang,pombredanne/go-deleteme,gnanderson/go,tv42/old-go,gnanderson/go,apparentlymart/golang,pombredanne/go-deleteme,apparentlymart/golang,gnanderson/go,pombredanne/go-deleteme,tv42/old-go,tv42/old-go,pombredanne/go-deleteme