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/license-expression/default.nix

@@ -0,0 +1,49 @@
+{ lib
+, boolean-py
+, buildPythonPackage
+, fetchFromGitHub
+, pytestCheckHook
+, pythonOlder
+, setuptools-scm
+}:
+
+buildPythonPackage rec {
+  pname = "license-expression";
+  version = "30.0.0";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "nexB";
+    repo = "license-expression";
+    rev = "v${version}";
+    hash = "sha256-tGXNZm9xH8sXa7dtBFsTzGgT+hfbmkwps7breR7KUWU=";
+  };
+
+  SETUPTOOLS_SCM_PRETEND_VERSION = version;
+
+  dontConfigure = true;
+
+  nativeBuildInputs = [
+    setuptools-scm
+  ];
+
+  propagatedBuildInputs = [
+    boolean-py
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "license_expression"
+  ];
+
+  meta = with lib; {
+    description = "Utility library to parse, normalize and compare License expressions";
+    homepage = "https://github.com/nexB/license-expression";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ fab ];
+  };
+}