multimc: wrapQtAppsHook, add xrandr for lwjgl 2.9.2

[samlich]

Motivation for this change

#65399 fixed by stdenv.mkDerivation => mkDerivation as new docs require
LWJGL/lwjgl#128 fixed by adding xrandr to PATH

cc @cleverca22

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
  545 MB before
  545 MB with xrandr
  722 MB with wrapQtAppsHook
  722 MB with both
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

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[ghost]

Builds and works fine, tested launching a vanilla 1.14 instance.
For some reason the bin folder contains some shared object files and jar files that are only used internally. Those should be moved to the appropriate directories if possible, but I can address that in a seperate PR.

[samueldr]

Hi! 👋

Thanks for your first contribution!

Overall, a good contribution 👍, the only thing that I would have liked seen done differently (but still acceptable this way) is to have two commits, one for the fix for wrapping, and one for the xrandr fix. Only something to keep in for your next contributions :).

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@petabyteboy you're right that those files should be somewhere else. Though yeah, that's not this PR's business. Though it does add one small hack to make the wrap hook pass.