Separate SHA256 and SHA512 into separate files

This is just to pave the way for better use of vboot by the EC.

BUG=chrome-os-partner:7459
TEST=manual

  make
  make runtests

Change-Id: I2e68371039bfc1b492245db12facf0c5ad592824
Reviewed-on: https://gerrit.chromium.org/gerrit/22301
Tested-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Ready: Bill Richardson <wfrichar@chromium.org>
4 files changed