Requires policycoreutils-2.1.13-55 to avoid another break on selinux disabled.

When selinux is disabled on f18, it fails to import module sepolicy
with an exception. It causes the the vdsm-tool unavailable, and therefore
the bonding module can't be loaded when vdsm starts up. For details,
please see https://bugzilla.redhat.com/show_bug.cgi?id=889698

Change-Id: I09387167ceeffdc104910103b8381954296cdbe9
Signed-off-by: Mark Wu <wudxw@linux.vnet.ibm.com>
Reviewed-on: http://gerrit.ovirt.org/11730
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Tested-by: Dan Kenigsberg <danken@redhat.com>