FIX: distribute.sh wrong name for SDL/GDI

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7372 8aca7d54-2c30-db11-9de9-000461428c89
Release 120,0,1

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7373 8aca7d54-2c30-db11-9de9-000461428c89