join.py: Set NT ACL on crossRef object for new partition

Change-Id: Icb1b00697cc5641481370ded26f2f0551a5b2a97
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>

Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Tue Sep  2 14:15:54 CEST 2014 on sn-devel-104
ctdb-build: SAMBA_BINARY targets should not include bin/ prefix

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>

Autobuild-User(master): Amitay Isaacs <amitay@samba.org>
Autobuild-Date(master): Wed Sep  3 06:26:16 CEST 2014 on sn-devel-104