Replaces putUint{32,64} functions in crypto/sha* packages with the
equivalent functions encoding/binary.BigEndian.PutUint{32,64}.

Change-Id: I9208d2125202ea9c97777560e6917d21893aced0
Reviewed-on: https://go-review.googlesource.com/c/go/+/156117Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>