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/rbtools/default.nix

@@ -0,0 +1,35 @@
+{ lib
+, buildPythonPackage
+, fetchurl
+, isPy3k
+, setuptools
+, colorama
+, six
+, texttable
+, tqdm
+}:
+
+buildPythonPackage rec {
+  pname = "rbtools";
+  version = "1.0.2";
+
+  disabled = !isPy3k;
+
+  src = fetchurl {
+    url = "https://downloads.reviewboard.org/releases/RBTools/${lib.versions.majorMinor version}/RBTools-${version}.tar.gz";
+    sha256 = "577c2f8bbf88f77bda84ee95af0310b59111c156f48a5aab56ca481e2f77eaf4";
+  };
+
+  propagatedBuildInputs = [ six texttable tqdm colorama setuptools ];
+
+  # The kgb test dependency is not in nixpkgs
+  doCheck = false;
+
+  meta = with lib; {
+    homepage = "https://www.reviewboard.org/docs/rbtools/dev/";
+    description = "RBTools is a set of command line tools for working with Review Board and RBCommons";
+    license = licenses.mit;
+    maintainers = with maintainers; [ domenkozar ];
+  };
+
+}