Disable sdl2-ttf tests in haskellng packages.

The testsuite of the sdl2-ttf requires user input to finish, thats why
it should be disabled until a version which fixed this problem is
available on hackage.

Closes https://github.com/NixOS/nixpkgs/pull/7464.

pkgs/development/haskell-modules/configuration-common.nix

@@ -426,6 +426,7 @@ self: super: {
   Rlang-QQ = dontCheck super.Rlang-QQ;
   sai-shape-syb = dontCheck super.sai-shape-syb;
   scp-streams = dontCheck super.scp-streams;
+  sdl2-ttf = dontCheck super.sdl2-ttf; # as of version 0.2.1, the test suite requires user intervention
   separated = dontCheck super.separated;
   shadowsocks = dontCheck super.shadowsocks;
   shake-language-c = dontCheck super.shake-language-c;