Remove '/run/vdsm' from vdsm-tmpfiles.d.conf

'/var/run' is symlink of '/run', so the dir '/run/vdsm' also be
created when the tempfiles service create '/var/run/vdsm'. And
we don't use '/run/vdsm' directly, so we don't need care about it.

Change-Id: I3872ed37850142d81dd324f38f7f018168f6850c
Signed-off-by: Mark Wu <wudxw@linux.vnet.ibm.com>
Reviewed-on: http://gerrit.ovirt.org/16905
Reviewed-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>