Ensure we test the dirsort module in make test.

Ensure we test the dirsort module in make test.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Apr 11 21:17:21 CEST 2013 on sn-devel-104

The last 10 patches address bug #9777 - vfs_dirsort uses non-stackable calls,
dirfd(), malloc instead of talloc and doesn't cope with directories being
modified whilst reading.
(cherry picked from commit 1f601d14d0ee440126d7202924e5cf7af88f6ea3)