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/pyutil/default.nix

@@ -0,0 +1,45 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, simplejson
+, mock
+, twisted
+, isPyPy
+}:
+
+buildPythonPackage rec {
+  pname = "pyutil";
+  version = "3.3.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "8c4d4bf668c559186389bb9bce99e4b1b871c09ba252a756ccaacd2b8f401848";
+  };
+
+  propagatedBuildInputs = [ simplejson ];
+
+  checkInputs = [ mock twisted ];
+
+  prePatch = lib.optionalString isPyPy ''
+    grep -rl 'utf-8-with-signature-unix' ./ | xargs sed -i -e "s|utf-8-with-signature-unix|utf-8|g"
+  '';
+
+  meta = with lib; {
+    description = "Pyutil, a collection of mature utilities for Python programmers";
+
+    longDescription = ''
+      These are a few data structures, classes and functions which
+      we've needed over many years of Python programming and which
+      seem to be of general use to other Python programmers. Many of
+      the modules that have existed in pyutil over the years have
+      subsequently been obsoleted by new features added to the
+      Python language or its standard library, thus showing that
+      we're not alone in wanting tools like these.
+    '';
+
+    homepage = "https://github.com/tpltnt/pyutil";
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ prusnak ];
+  };
+
+}