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/django_reversion/default.nix

@@ -0,0 +1,29 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, django
+}:
+
+buildPythonPackage rec {
+  pname = "django-reversion";
+  version = "5.0.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-C63jw5k4dFEIfwxng14NPRhtdn3mpcW6U6iOr8Pyccg=";
+  };
+
+  # tests assume the availability of a mysql/postgresql database
+  doCheck = false;
+
+  propagatedBuildInputs = [ django ];
+
+  pythonImportsCheck = [ "reversion" ];
+
+  meta = with lib; {
+    description = "An extension to the Django web framework that provides comprehensive version control facilities";
+    homepage = "https://github.com/etianen/django-reversion";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ ];
+  };
+}