buildroot

libnl: bump to version 3.4.0

Drop static build fix patch; upstream fixed static build in a different
way (https://github.com/thom311/libnl/pull/141).

Following the patch removal, autoreconf is not needed anymore.

Add license hash.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>