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/et_xmlfile/default.nix

@@ -0,0 +1,40 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, lxml
+, pytest
+}:
+
+buildPythonPackage rec {
+  version = "1.0.1";
+  pname = "et_xmlfile";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256="0nrkhcb6jdrlb6pwkvd4rycw34y3s931hjf409ij9xkjsli9fkb1";
+  };
+
+  checkInputs = [ lxml pytest ];
+  checkPhase = ''
+    py.test $out
+  '';
+
+  meta = with lib; {
+    description = "An implementation of lxml.xmlfile for the standard library";
+    longDescription = ''
+      et_xmlfile is a low memory library for creating large XML files.
+
+      It is based upon the xmlfile module from lxml with the aim of
+      allowing code to be developed that will work with both
+      libraries. It was developed initially for the openpyxl project
+      but is now a standalone module.
+
+      The code was written by Elias Rabel as part of the Python
+      Düsseldorf openpyxl sprint in September 2014.
+    '';
+    homepage = "https://pypi.python.org/pypi/et_xmlfile";
+    license = licenses.mit;
+    maintainers = with maintainers; [ sjourdois ];
+  };
+
+}