Fix syntax error in vdsm.spec

Which introduced since http://gerrit.ovirt.org/21356

Change-Id: Ib636c00a6b9670584b5a862ac4496e74915fbe04
Signed-off-by: Yaniv Bronhaim <ybronhei@redhat.com>
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1040232
Reviewed-on: http://gerrit.ovirt.org/22310
Reviewed-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>