Add Mellanox device IDs that were included in prior releases, but somehow missing again here

cmr=v1.7.4:reviewer=miked
Per the discussion on email thread:

http://www.open-mpi.org/community/lists/devel/2013/12/13552.php

Patch configure for issues in NetBSD libtool

Thanks to Paul Hargrove for identifying the problem and providing the patch

cmr=v1.7.4:reviewer=jsquyres:subject=Patch configure for issues in NetBSD libtool