treewide: mark a bunch of failing builds as broken

(cherry picked from commit 23fdbaa37599f490435056b9865023870656571b)
[dezgeg: Un-mark shotcut, tokei & uchiwa that do build on master]

pkgs/development/libraries/qxt/default.nix

@@ -29,5 +29,6 @@ stdenv.mkDerivation rec {
     license = stdenv.lib.licenses.gpl2;
     platforms = stdenv.lib.platforms.linux;
     maintainers = with stdenv.lib.maintainers; [ forkk ];
+    broken = true;
   };
 }