Add VVVVVV recipe

• Requires non-free game assets (game.zip) from the Windows "Make and Play Edition" of the game: http://distractionware.com/blog/category/vvvvvv-make-and-play/ The zip needs to be placed to file:/games/vvvvvv/game.zip.

• There's a bug in the windowing code, the game window sometimes needs to be resized to 640x480 manually. Otherwise it only shows a black screen. Scaling also sometimes doesn't work properly yet.

• Depends on: https://gitlab.redox-os.org/fabiao/sdl2-src/merge_requests/2

• Demo video: https://www.youtube.com/watch?v=zguECSrsLFI