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/nixpkgs-pytools/default.nix

@@ -0,0 +1,35 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, jinja2
+, setuptools
+, rope
+, isPy27
+}:
+
+buildPythonPackage rec {
+  pname = "nixpkgs-pytools";
+  version = "1.3.0";
+  disabled = isPy27;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "11skcbi1lf9qcv9j5ikifb4pakhbbygqpcmv3390j7gxsa85cn19";
+  };
+
+  propagatedBuildInputs = [
+    jinja2
+    setuptools
+    rope
+  ];
+
+  # tests require network ..
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Tools for removing the tedious nature of creating nixpkgs derivations";
+    homepage = "https://github.com/nix-community/nixpkgs-pytools";
+    license = licenses.mit;
+    maintainers = [ maintainers.costrouc ];
+  };
+}