recompiled SDL2

git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk@1124 af15c1b1-3010-417e-b628-4374ebc0bcbd
run SDL_Quit() at exit

git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk@1125 af15c1b1-3010-417e-b628-4374ebc0bcbd