This makes sha1 be internal to bcm other than the shared (public) SHA_CTX structure and lengths. Change-Id: Ib30e0e54a988e6c74a171ecf1fb400e70a9187b0 Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/70567 Commit-Queue: Bob Beck <bbe@google.com> Reviewed-by: David Benjamin <davidben@google.com>