darwin.postLinkSignHook: fix reference to codesign_allocate

[Kha]

Motivation for this change

Make wrapped linkers work outside of stdenv, such as in runCommand.

Fixes #148189

Things done

As this triggers basically a full Darwin rebuild, I did not test more than building and running bash

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 22.05 Release Notes (or backporting 21.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

/cc @thefloweringash

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/repairing-codesign-allocate-on-darwin/16326/2

[domenkozar]

cc @NixOS/darwin-maintainers

[NilsIrl]

Got this while running nixpkgs-review, not sure what to do.

error: cannot coerce null to a string

       at /nix/store/i216g4xbzdf3sglffq28zas4kllfbr9b-nixpkgs-review-2.6.4/lib/python3.9/site-packages/nixpkgs_review/nix/evalAttrs.nix:12:35:

           11|     pkg = lib.attrByPath attrPath null pkgs;
           12|     maybePath = builtins.tryEval "${pkg}";
             |                                   ^
           13|   in rec {
nix --experimental-features nix-command --system aarch64-darwin eval --json --impure --expr (import /nix/store/i216g4xbzdf3sglffq28zas4kllfbr9b-nixpkgs-review-2.6.4/lib/python3.9/site-packages/nixpkgs_review/nix/evalAttrs.nix { allowAliases = true; attr-json = /var/folders/np/f2vk_vjj4257l5xsg39fs2t00000gn/T/tmpke49_t33; }) failed to run, /var/folders/np/f2vk_vjj4257l5xsg39fs2t00000gn/T/tmpke49_t33 was stored inspection
https://github.com/NixOS/nixpkgs/pull/150074 failed to build
$ git worktree prune

[sternenseemann]

PR'd an evaluating, but otherwise untested version of this at #148282

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/repairing-codesign-allocate-on-darwin/16326/6

[Kha]

Closing in favor of #148282