configs/beelink_gs1: use Python 3.x
Since the bump to U-Boot 2020.01 in commit
e210080d2ab4d77862c42d2b318e21fab461f127, it needs Python 3.x on the
host.
Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/535054357
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Acked-by: Clément Péron <peron.clem@gmail.com>
[yann.morin.1998@free.fr: update with the new NEEDS_PYTHON semantics]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>