Remove verbosity from restorecon hack for /var/log/core.

vebosity spams consoel during installation.

Change-Id: I862039a6dfeebe38fc5c62276ae98213ef92bd02
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1031109
Signed-off-by: Mooli Tayer <mtayer@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/21888
Reviewed-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>