retroarch.cfg: Fix input and directory overlay.
Updated debian package, added DSP and video soft filters to the package.
No retroarch.cfg in debian directory, using quilt patch.
Remove quilt patch for retroarch.cfg.
Add last resort SDL gfx context
(SDL2) Fix typo
Fix debian/rules.
Merge pull request #892 from heuripedes/sdl-gl-context

Add last resort SDL gfx/gl context
Merge pull request #887 from sergiobenrocha2/master

Fix overlay examples in retroarch.cfg and debian packaging update
Don't use SDL GL contexts with OpenGL disabled.
Windows needs this file too.
Enable sdl_gl for SDL2 windows builds