packaging: spec: own /etc/pki/vdsm/libvirt-spice

Change-Id: If939a60a916c1cc8c529d91e4bc379032048d42e
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/19318
Reviewed-by: Dan Kenigsberg <danken@redhat.com>