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/traitlets/default.nix

@@ -0,0 +1,36 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, glibcLocales
+, pytest
+, mock
+, ipython_genutils
+, decorator
+, pythonOlder
+, six
+}:
+
+buildPythonPackage rec {
+  pname = "traitlets";
+  version = "5.1.1";
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-BZ9FbFp8HIK5jC6MeZ85ybgSj20NRpQe4RjarOnrcMc=";
+  };
+
+  checkInputs = [ glibcLocales pytest mock ];
+  propagatedBuildInputs = [ ipython_genutils decorator six ];
+
+  checkPhase = ''
+    LC_ALL="en_US.UTF-8" py.test
+  '';
+
+  meta = {
+    description = "Traitlets Python config system";
+    homepage = "http://ipython.org/";
+    license = lib.licenses.bsd3;
+    maintainers = with lib.maintainers; [ fridh ];
+  };
+}