The test

Network.HTTP.Link, writeLinkHeader → parseLinkHeader, roundtrips successfully

seems to flap, as I cannot reproduce the failure locally, but it occured on
Hydra [0]. Also upstream is aware of the problem [1].

[0] https://hydra.nixos.org/build/75041105
[1] sjshuck/http-link-header#7

Motivation for this change

As the Hydra build failed, I needed to build haskellPackages.github-backup by myself, as it depends on the package in question. As the local build was successful without this patch, it seems to me like

• the test suite of http-link-header is flapping
• the local build could be avoided by disabling the test suite

Things done

Disabled tests on haskellPackages.http-link-header.

• 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 nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.