handle basename missing from kernel image

basename got removed during the F18 dev cycle, this patch
includes it always in ovirt-node builds

Change-Id: Ia4d79a464c9aefc74b832772bf1eb50317d29a0e
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>
Signed-off-by: Mike Burns <mburns@redhat.com>