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/tools/misc/colorz/default.nix

@@ -0,0 +1,24 @@
+{ lib, python3Packages }:
+
+python3Packages.buildPythonApplication rec {
+  pname = "colorz";
+  version = "1.0.3";
+
+  src = python3Packages.fetchPypi {
+    inherit pname version;
+    sha256 = "0ghd90lgplf051fs5n5bb42zffd3fqpgzkbv6bhjw7r8jqwgcky0";
+  };
+
+  propagatedBuildInputs = with python3Packages; [ pillow scipy ];
+
+  checkPhase = ''
+    $out/bin/colorz --help > /dev/null
+  '';
+
+  meta = with lib; {
+    description = "Color scheme generator";
+    homepage = "https://github.com/metakirby5/colorz";
+    license = licenses.mit;
+    maintainers = with maintainers; [ skykanin ];
+  };
+}