glide: Add unused files from upstream.

https://github.com/mupen64plus/mupen64plus-video-glide64mk2/commit/21c67846981626ae099a3dc06cadc2ceeb8f56af
assets: Sync glide ini file from upstream.

https://github.com/mupen64plus/mupen64plus-video-glide64mk2/commit/21c67846981626ae099a3dc06cadc2ceeb8f56af
glide: Sync most stuff from upstream.

https://github.com/mupen64plus/mupen64plus-video-glide64mk2/commit/21c67846981626ae099a3dc06cadc2ceeb8f56af