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/rig/default.nix

@@ -0,0 +1,29 @@
+{ lib, buildPythonPackage, fetchPypi
+, isPy35, isPy27
+, numpy, pytz, six, enum-compat, sentinel
+}:
+
+buildPythonPackage rec {
+  pname = "rig";
+  version = "2.4.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "5a3896dbde3f291c5dd34769e7329ef5d5e4da34fee53479bd13dc5e5d540b8a";
+  };
+
+  propagatedBuildInputs = [ numpy pytz six sentinel enum-compat ];
+
+  # This is the list of officially supported versions. Other versions may work
+  # as well.
+  disabled = !(isPy27 || isPy35);
+
+  # Test Phase is only supported in development sources.
+  doCheck = false;
+
+  meta = with lib; {
+    description = "A collection of tools for developing SpiNNaker applications";
+    homepage = "https://github.com/project-rig/rig";
+    license = licenses.gpl2;
+  };
+}