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/spdx-tools/default.nix

@@ -0,0 +1,46 @@
+{ lib
+, buildPythonPackage
+, click
+, fetchPypi
+, pyyaml
+, rdflib
+, ply
+, xmltodict
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "spdx-tools";
+  version = "0.7.0a3";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-afV1W1n5ubHhqfLFpPO5fxaIy5TaZdw9eDy3JYOJ1oE=";
+  };
+
+  propagatedBuildInputs = [
+    click
+    ply
+    pyyaml
+    rdflib
+    xmltodict
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "spdx"
+  ];
+
+  meta = with lib; {
+    description = "SPDX parser and tools";
+    homepage = "https://github.com/spdx/tools-python";
+    license = licenses.asl20;
+    maintainers = teams.determinatesystems.members;
+  };
+}