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/yamale/default.nix

@@ -0,0 +1,43 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pythonOlder
+, pytestCheckHook
+, pyyaml
+, ruamel-yaml
+}:
+
+buildPythonPackage rec {
+  pname = "yamale";
+  version = "4.0.4";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "23andMe";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-1GFvgfy3MDsJGKSEm0yaQoLM7VqIS2wphw16trNTUOc=";
+  };
+
+  propagatedBuildInputs = [
+    pyyaml
+    ruamel-yaml
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "yamale"
+  ];
+
+  meta = with lib; {
+    description = "A schema and validator for YAML";
+    homepage = "https://github.com/23andMe/Yamale";
+    license = licenses.mit;
+    maintainers = with maintainers; [ rtburns-jpl ];
+  };
+}