Motivation for this change

opam extension tools like 'opam depext' don't work because of interaction of wrap-program with ocaml/opam#2142 ...

Things done

Changed wrap-program to a more explicit makeWrapper use that avoids using an absolute path for argv0.

• 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.