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/twill/default.nix

@@ -0,0 +1,41 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, lxml
+, requests
+, pyparsing
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "twill";
+  version = "3.0.2";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-dWtrdkiR1+IBfeF9jwbOjKE2UMXDJji0iOb+USbY7zk=";
+  };
+
+  propagatedBuildInputs = [
+    lxml
+    requests
+    pyparsing
+  ];
+
+  pythonImportsCheck = [
+    "twill"
+  ];
+
+  # pypi package comes without tests, other homepage does not provide all verisons
+  doCheck = false;
+
+  meta = with lib; {
+    description = "A simple scripting language for Web browsing";
+    homepage = "https://twill-tools.github.io/twill/";
+    license = licenses.mit;
+    maintainers = with maintainers; [ mic92 ];
+  };
+}