RELENG-428 fix build problems with SHA512 and MG builds.
RELENG-428 fix build problems with SHA512 and MG builds.

kaizengarden/sdc-headnode,numericillustration/sdc-headnode,numericillustration/sdc-headnode,joyent/sdc-headnode,joyent/sdc-headnode,joyent/sdc-headnode,joyent/sdc-headnode,kaizengarden/sdc-headnode,kaizengarden/sdc-headnode,numericillustration/sdc-headnode,kaizengarden/sdc-headnode