COPYING: use http://www.gnu.org/licenses/gpl-2.0.txt
COPYING.LIB: use http://www.gnu.org/licenses/lgpl-2.1.txt

As described in FAQ, one shall not trim those down:
http://www.gnu.org/licenses/old-licenses/gpl-2.0-faq.html#GPLOmitPreamble
(cherry picked from commit 7665bfa3)
Signed-off-by: Konstantin Pavlov <thresh@videolan.org>