SHA-512 is faster to calculate on 64-bit systems and that's what we were
using before. (Though, realistically, this doesn't show up at all.)
Change-Id: Id4f386ca0b5645a863b36405eef03bc62d0f29b3
Reviewed-on: https://boringssl-review.googlesource.com/16006
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
