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/frozendict/default.nix

@@ -0,0 +1,42 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, isPy3k
+, pytestCheckHook
+, python
+}:
+
+buildPythonPackage rec {
+  pname = "frozendict";
+  version = "2.3.1";
+  format = "setuptools";
+
+  disabled = !isPy3k;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-vJHGkjPrkWu268QJiLbYSXNXcCQO/JxgvkW0q5GcG94=";
+  };
+
+  pythonImportsCheck = [
+    "frozendict"
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  preCheck = ''
+    pushd test
+  '';
+
+  postCheck = ''
+    popd
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/slezica/python-frozendict";
+    description = "An immutable dictionary";
+    license = licenses.mit;
+  };
+}