clipboard-jh: fixed broken system clipboard integration

[heinwol]

fixes #229659 as well as Slackadays/Clipboard#117

Description of changes

• fixed rpath of $out/bin/cb by adding $out/lib explicitly via patchelf
• added patchelf dependency, obviously

Things done

Tested on my machine (x11, kde), works as previously but now one can e.g. write cb p | cat with something in system clipboard and it will actually be pasted. Should work fine on wayland as well.

• 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 basic functionality of all binary files (usually in ./result/bin/)
• 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
• 23.05 Release Notes (or backporting 22.11 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
• Fits CONTRIBUTING.md.

[heinwol]

Well, I see I've missed some trailing spaces. What's better to do now? Close the pr and open a new one or can I simply make a commit on top of that? Is there a way to just edit this commit?

[StrictlyMonad]

Well, I see I've missed some trailing spaces. What's better to do now?

@heinwol just amend (no reword) changes to current commit and force push.