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/urlgrabber/default.nix

@@ -0,0 +1,20 @@
+{ lib, buildPythonPackage, fetchPypi, pycurl, six }:
+
+buildPythonPackage rec {
+  pname = "urlgrabber";
+  version = "4.1.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "075af8afabae6362482d254e5ac3ffa595d1766117b684e53d9c25c2e937e139";
+  };
+
+  propagatedBuildInputs = [ pycurl six ];
+
+  meta = with lib; {
+    homepage = "http://urlgrabber.baseurl.org";
+    license = licenses.lgpl2Plus;
+    description = "Python module for downloading files";
+    maintainers = with maintainers; [ qknight ];
+  };
+}