Motivation for this change

I was having the following evaluation error since #104010 was merged:

error: --- EvalError ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- nix
at: (106:26) in file: /nix/store/5aigpip3sx9lg5sfzjhsx2xciy143f2p-source/pkgs/build-support/emacs/wrapper.nix

   105|         mkdir -p $out/share/emacs/site-lisp
   106|         ${optionalString emacs.nativeComp ''
      |                          ^
   107|           mkdir -p $out/share/emacs/native-lisp

attribute 'nativeComp' missing

This was due to the use of emacs.nativeComp in one place while nativeComp (set to emacs.nativeComp or false) should have been used, and was actually used everywhere else in the file.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• 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 nixpkgs-review --run "nixpkgs-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)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.