nixos/stage-1: fix stripping

[Artturin]

got broken in 6ea1a2a which changed runCommandCC to runCommand but was not
noticed because it was failing silently

runCommand doesn't include CC or bintools

Description of changes

Things done

• 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/)
• 23.11 Release Notes (or backporting 23.05 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
• Fits CONTRIBUTING.md.

[Artturin]

before 25M
after 23M

[SuperSandro2000]

was not noticed because it was failing silently

Got that fixed already? We should really make this an hard error

[Artturin]

was not noticed because it was failing silently

Got that fixed already? We should really make this an hard error

#207101 made it error as a side effect, but with a confusing error message.

I'll add checking and a better error message to #244400

[github-actions]

Successfully created backport PR for release-23.05:

• [Backport release-23.05] nixos/stage-1: fix stripping #244588

[Artturin]

nix build -f. nixosTests.systemd-boot fails but it was failing on master

nix build -f. nixosTests.simple builds