haskell-ghc-mod: add 5.0.1

Separate expression for now due to big API chanages.

noCheck due to https://github.com/kazu-yamamoto/ghc-mod/issues/335
It's hard for me to tell. `ghc-mod` binary works well as far as I can tell but `ghc-modi` does not however I don't know whether it's because I'm trying to use it wrong or because something changed. One of the maintainers listed should probably pitch in here.