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/development/python-modules/vdf/default.nix

@@ -0,0 +1,28 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, mock
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "vdf";
+  version = "3.4";
+
+  src = fetchFromGitHub {
+    owner = "ValvePython";
+    repo = pname;
+    rev = "v${version}";
+    hash = "sha256-6ozglzZZNKDtADkHwxX2Zsnkh6BE8WbcRcC9HkTTgPU=";
+  };
+
+  checkInputs = [ mock pytestCheckHook ];
+  pythonImportsCheck = [ "vdf" ];
+
+  meta = with lib; {
+    description = "Library for working with Valve's VDF text format";
+    homepage = "https://github.com/ValvePython/vdf";
+    license = licenses.mit;
+    maintainers = with maintainers; [ kira-bruneau ];
+  };
+}