Replace SHA1 with SHA256 digest algorithm.

Signed-off-by: tye
Reviewed-by: hhuan13
Reviewed-by: qlong



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12350 6f19259b-4bc3-4df7-8a09-765794883524
1 file changed