vendored vorbis with cmake

[sezero]

@madebr: Do we want this proposed patch in our fork? xiph/vorbis#98

[madebr]

It's not a must-have, but a nice-to-have.
Let's add it, because only libvorbis is mising the libvXXX.so.X symlink.

I just added dbry/WavPack@25e12cf and dbry/WavPack@7c1dd72 to our wavpack fork to version the libwavpack.so library.

[madebr]

Fixed in SDL2_mixer: b08b52b
Fixed in SDL3_mixer: 7127e9e + 7321817