[Bug 1542425] New: do not set RUNPATH to %_libdir

https://bugzilla.redhat.com/show_bug.cgi?id=1542425

Bug ID: 1542425
           Summary: do not set RUNPATH to %_libdir
           Product: Fedora
           Version: rawhide
         Component: ghc-rpm-macros
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
                CC: [e-mail],
                    [e-mail]

Description of problem:
Currently in F28 Rawhide RUNPATH is editted or reduced to just %{_libdir}.
If RUNPATH == %{_libdir} we should just delete it completely
like we do in ghc.spec for ghc libraries.