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/pykwalify/default.nix

@@ -0,0 +1,61 @@
+{ lib
+, buildPythonPackage
+, python-dateutil
+, docopt
+, fetchPypi
+, pytestCheckHook
+, pyyaml
+, ruamel-yaml
+, testfixtures
+}:
+
+buildPythonPackage rec {
+  version = "1.8.0";
+  pname = "pykwalify";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-eWsq0+1MuZuIMItTP7L1WcMPpu+0+p/aETR/SD0kWIQ=";
+  };
+
+  propagatedBuildInputs = [
+    python-dateutil
+    docopt
+    pyyaml
+    ruamel-yaml
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+    testfixtures
+  ];
+
+  disabledTests = [
+    "test_multi_file_support"
+  ];
+
+  pythonImportsCheck = [ "pykwalify" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/Grokzen/pykwalify";
+    description = "YAML/JSON validation library";
+    longDescription = ''
+      This framework is a port with a lot of added functionality
+      of the Java version of the framework kwalify that can be found at
+      http://www.kuwata-lab.com/kwalify/
+
+      The original source code can be found at
+      http://sourceforge.net/projects/kwalify/files/kwalify-java/0.5.1/
+
+      The source code of the latest release that has been used can be found at
+      https://github.com/sunaku/kwalify.
+      Please note that source code is not the original authors code
+      but a fork/upload of the last release available in Ruby.
+
+      The schema this library is based on and extended from:
+      http://www.kuwata-lab.com/kwalify/ruby/users-guide.01.html#schema
+    '';
+    license = licenses.mit;
+    maintainers = with maintainers; [ siriobalmelli ];
+  };
+}