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/ruamel-yaml/default.nix

@@ -0,0 +1,33 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, ruamel-base
+, ruamel-yaml-clib
+, isPyPy
+}:
+
+buildPythonPackage rec {
+  pname = "ruamel-yaml";
+  version = "0.17.21";
+
+  src = fetchPypi {
+    pname = "ruamel.yaml";
+    inherit version;
+    sha256 = "sha256-i3zml6LyEnUqNcGsQURx3BbEJMlXO+SSa1b/P10jt68=";
+  };
+
+  # Tests use relative paths
+  doCheck = false;
+
+  propagatedBuildInputs = [ ruamel-base ]
+    ++ lib.optional (!isPyPy) ruamel-yaml-clib;
+
+  pythonImportsCheck = [ "ruamel.yaml" ];
+
+  meta = with lib; {
+    description = "YAML parser/emitter that supports roundtrip preservation of comments, seq/map flow style, and map key order";
+    homepage = "https://sourceforge.net/projects/ruamel-yaml/";
+    license = licenses.mit;
+    maintainers = with maintainers; [ SuperSandro2000 ];
+  };
+}