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/pytest-datafiles/default.nix

@@ -0,0 +1,43 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, py
+, pytest
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "pytest-datafiles";
+  version = "2.0.1";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "omarkohl";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-M0Lnsqi05Xs0uN6LlafNS7HJZOut+nrMZyvGPMMhIkc=";
+  };
+
+  buildInputs = [
+    py
+    pytest
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "pytest_datafiles"
+  ];
+
+  meta = with lib; {
+    description = "Pytest plugin to create a tmpdir containing predefined files/directories";
+    homepage = "https://github.com/omarkohl/pytest-datafiles";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+  };
+}