Missing libxnvctrl package causes crash

This is the same bug as mangohud#1 (closed) (just happening in the 32-bit library version)

The only difference is that Arch Linux doesn't even package 32-bit libxnvctrl library (so this commit will likely have to be backported to fix this issue: https://github.com/flightlessmango/MangoHud/commit/fde62484e0e1724569ecc86df8e1ffbe2bc3510a)