Merge pull request #154989 from veprbl/pr/broken_graphia

graphia: mark as broken on darwin

pkgs/applications/science/misc/graphia/default.nix

···
     license = licenses.gpl3Only;
     maintainers = [ maintainers.bgamari ];
     platforms = platforms.all;
+    broken = stdenv.isDarwin; # never built on Hydra https://hydra.nixos.org/job/nixpkgs/trunk/graphia.x86_64-darwin
   };
 }