hakuneko: mark as broken

This project was abandoned upstream in favor a new project based on
electron. This version builds yet the code doesn't work with most
providers, so it is practically broken.

pkgs/tools/misc/hakuneko/default.nix

@@ -21,5 +21,8 @@ stdenv.mkDerivation rec {
     homepage = https://sourceforge.net/projects/hakuneko/;
     license = stdenv.lib.licenses.mit;
     platforms = stdenv.lib.platforms.linux;
+
+    # This project was abandoned upstream.
+    broken = true;
   };
 }