Adding %configure flags for rhev_build

Change-Id: Ib89f92b980b9292414a5fdd310aea03a19c7885d
Signed-off-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/36351
Reviewed-by: Dima Kuznetsov <dkuznets@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>