[OCaml/buildDunePackage] tell dune where to install doc and man

[bobot]

Description of changes

buildDunePackage helper
fixupPhase move $out/doc to $out/share/doc (same for man). So the information of their location in the dune-project file is outdated which breaks dependencies on packages ( (package foo)).

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/)
• 23.05 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
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[bobot]

@vbgl do you have time to look at it? thanks

[vbgl]

This does not work with dune 1:

dune: unknown option --doc', did you mean --dev' ?
unknown option `--man'.

[vbgl]

The doc/ directory has been addressed there: #220592.

[bobot]

@vbgl Thank you for the heads up. rebased and added in the conditional.

[vbgl]

Thanks.