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/derpconf/default.nix

@@ -0,0 +1,19 @@
+{ lib, buildPythonPackage, fetchPypi, six }:
+
+buildPythonPackage rec {
+  pname = "derpconf";
+  version = "0.8.3";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1bb152d8a1cf5c2a6d629bf29acd4af0c00811339642fc0a56172b0a83b31a15";
+  };
+
+  propagatedBuildInputs = [ six ];
+
+  meta = with lib; {
+    description = "derpconf abstracts loading configuration files for your app";
+    homepage = "https://github.com/globocom/derpconf";
+    license = licenses.mit;
+  };
+}