Copyright year update.
Fixes:
http://autobuild.buildroot.net/results/2c8/
2c865463a4b7524114518c04dce9c94252433460/
Cc: Guillaume Gardet <guillaume.gardet@oliseo.fr>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
# Locally calculated after checking http://www.libsdl.org/release/SDL2-2.0.8.tar.gz.sig
sha256 edc77c57308661d576e843344d8638e025a7818bff73f8fbfab09c3c5fd092ec SDL2-2.0.8.tar.gz
# Locally calculated
-sha256 bbd2edb1789c33de29bb9f8d1dbe2774584a9ce8c4e3162944b7a3a447f5e85d COPYING.txt
+sha256 61e627031e1160bf8b9bdbc9cda27656d422ea8eaab199b64b4a4a4168437154 COPYING.txt