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/towncrier/default.nix

@@ -0,0 +1,54 @@
+{ lib, buildPythonPackage, fetchPypi, isPy27
+, click
+, click-default-group
+, incremental
+, jinja2
+, mock
+, pytestCheckHook
+, toml
+, twisted
+, setuptools
+, git # shells out to git
+}:
+
+buildPythonPackage rec {
+  pname = "towncrier";
+  version = "21.9.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-nLb0XBbhoe7J0OdlEWXnvmDNCrgdE6XJbKl6SYrof0g=";
+  };
+
+  propagatedBuildInputs = [
+    click
+    click-default-group
+    incremental
+    jinja2
+    toml
+    setuptools
+  ];
+
+  # zope.interface collision
+  doCheck = !isPy27;
+
+  preCheck = ''
+    export PATH=$out/bin:$PATH
+  '';
+
+  checkInputs = [
+    git
+    mock
+    twisted
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [ "towncrier" ];
+
+  meta = with lib; {
+    description = "Utility to produce useful, summarised news files";
+    homepage = "https://github.com/twisted/towncrier/";
+    license = licenses.mit;
+    maintainers = with maintainers; [  ];
+  };
+}