Support for immutable versions of Fedora

[PVermeer]

Hey @WeirdTreeThing!

I've created a copr repo to support immutable fedora distro's!

https://copr.fedorainfracloud.org/coprs/pvermeer/chromebook-linux-audio
https://github.com/PVermeer/chromebook-linux-audio

It works by packaging this repo and the alsa-ucm-conf-cros repo while disabling the git clone in your script. The alsa-ucm-conf-cros repo is then copied to /tmp so the script can use it.

The script run in the %post step so it has write access to the system and can make the necessary adjustments.

Let me know what you think!