coreutils: disable tests which fail in sandbox

[SuperSandro2000]

Motivation for this change

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.

[veprbl]

Is coreutils broken currently? I don't see a failing build on Hydra.

[SuperSandro2000]

I don't think this is broken for hydra but when building it on my machine it is broken. I needed to rebuild the full stdenv for testing futile coreutils stdenv and this prevented me from doing that.

[veprbl]

"futile"? future? Is this for a version bump? I still don't understand, sorry.

[SuperSandro2000]

"futile"? future? Is this for a version bump? I still don't understand, sorry.

I meant to write uutils coreutils stdenv which I was trying at the time.