The package has no licence information. So let's fix it.
Signed-off-by: Florian Eckert <fe@dev.tdt.de>
(cherry picked from commit 0da116f25b1a80ac9429fd7d13ee30130494f19e)
Link: https://github.com/openwrt/openwrt/pull/15918
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>