attempt to fix the darwin64 special case for luajittex


git-svn-id: https://foundry.supelec.fr/svn/luatex/branches/experimental@4757 0b2b3880-5936-4365-a048-eb17d2e5a6bf
previous test was wrong, retry


git-svn-id: https://foundry.supelec.fr/svn/luatex/branches/experimental@4758 0b2b3880-5936-4365-a048-eb17d2e5a6bf