uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/games/openttd/nml.nix

@@ -0,0 +1,22 @@
+{ stdenv, lib, fetchFromGitHub, python3Packages }:
+
+python3Packages.buildPythonApplication rec {
+  pname = "openttd-nml";
+  version = "0.6.1";
+
+  src = fetchFromGitHub {
+    owner = "OpenTTD";
+    repo = "nml";
+    rev = version;
+    sha256 = "0z0n4lqvnqigfjjhmmz7mvis7iivd4a8d287ya2yscfg5hznnqh2";
+  };
+
+  propagatedBuildInputs = with python3Packages; [ply pillow];
+
+  meta = with lib; {
+    description = "Compiler for OpenTTD NML files";
+    homepage    = "http://openttdcoop.org/";
+    license     = licenses.gpl2;
+    maintainers = with maintainers; [ ToxicFrog ];
+  };
+}