spec: Add numactl dependency in spec file

Add numactl package dependency in vdsm spec files. This package is
needed by vdsm numa feature.

Change-Id: I2257acef9b2aa67d1457cf4b59dc377218720223
Bug-Url: https://bugzilla.redhat.com/1069303
Signed-off-by: Bruce Shi <xiao-lei.shi@hp.com>
Reviewed-on: http://gerrit.ovirt.org/27233
Reviewed-by: Piotr Kliczewski <piotr.kliczewski@gmail.com>
Reviewed-by: Vinzenz Feenstra <vfeenstr@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Reviewed-by: Douglas Schilling Landgraf <dougsland@redhat.com>