Bundle libgstlibav & deps

[IsaacMarovitz]

Superceeds #4.

[101arrowz]

I will point out that when I tried this on CrossOver Wine, it caused Steam to launch much more slowly for me than my change, and additionally this does not support hardware acceleration. If you're doing this though, might as well remove libgstapplemedia too.

[101arrowz]

If you're having issues with locating and bundling dependencies, I'd suggest taking a look at what I did here, which works quite well and operates recursively so it doesn't miss anything. (I actually managed to make it work without installing Homebrew at all by simply fetching the bottles and patching them like Homebrew does, but that's probably not necessary given that you're using GH actions for builds.)

[Gcenx]

@IsaacMarovitz id recommend working on this offline so save yourself a headache with actions.