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/elementpath/default.nix

@@ -0,0 +1,34 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "elementpath";
+  version = "2.5.3";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "sissaschool";
+    repo = "elementpath";
+    rev = "refs/tags/v${version}";
+    hash = "sha256-+NCsWPt5yMXe+GR9nEBU7byYhKrH/6xghQioj9AOGm4=";
+  };
+
+  # avoid circular dependency with xmlschema which directly depends on this
+  doCheck = false;
+
+  pythonImportsCheck = [
+    "elementpath"
+  ];
+
+  meta = with lib; {
+    description = "XPath 1.0/2.0 parsers and selectors for ElementTree and lxml";
+    homepage = "https://github.com/sissaschool/elementpath";
+    license = licenses.mit;
+    maintainers = with maintainers; [ jonringer ];
+  };
+}