crypto.c:
autodetect endian and wordsize with gnuisms

BKrev: 42602efdZ8LfQwIHBFrdtsjrK3BtCg


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@602 fd59a12c-fef9-0310-b244-a6a79926bd2f