package/neardal: license is LGPL-2.0, not GPL-2.0

COPYING states LGPL-2.0, not GPL-2.0:

                  GNU LIBRARY GENERAL PUBLIC LICENSE
                       Version 2, June 1991

So use that for the license tag.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>