Bump requires version of selinux-policy-targeted

Current SElinux policy prevent the dhcp hook for source routing
from running. It has been fixed in latest selinux policy, so we
we need bump the requires version. More information, please see:
https://bugzilla.redhat.com/show_bug.cgi?id=977856

Change-Id: Ia2521d34dafdad2bba57c6da16253ff10f8a780f
Signed-off-by: Mark Wu <wudxw@linux.vnet.ibm.com>
Reviewed-on: http://gerrit.ovirt.org/17642
Reviewed-by: Antoni Segura Puimedon <asegurap@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>