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/plac/default.nix

@@ -0,0 +1,35 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, python
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "plac";
+  version = "1.3.5";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-OL3YZNBFD7dIGTqoF7nEWKj1MZ+/l7ImEVHPwKWBIJA=";
+  };
+
+  checkPhase = ''
+    cd doc
+    ${python.interpreter} -m unittest discover -p "*test_plac*"
+  '';
+
+  pythonImportsCheck = [
+    "plac"
+  ];
+
+  meta = with lib; {
+    description = "Parsing the Command Line the Easy Way";
+    homepage = "https://github.com/micheles/plac";
+    license = licenses.bsdOriginal;
+    maintainers = with maintainers; [ ];
+  };
+}