tap_fd_set_vnet_le/tap_fd_set_vnet_be was missing,
fix it up.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>