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/python2-modules/enum/default.nix

@@ -0,0 +1,26 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, isPy3k
+, isPyPy
+}:
+
+buildPythonPackage rec {
+  pname = "enum";
+  version = "0.4.7";
+  disabled = isPy3k;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "001iq0yqs9f5bslvl793bhkcs71k5km9kv8yrj5h0lfsgrcg6z4c";
+  };
+
+  doCheck = !isPyPy;
+
+  meta = with lib; {
+    homepage = "https://pypi.python.org/pypi/enum/";
+    description = "Robust enumerated type support in Python";
+    license = licenses.gpl2;
+  };
+
+}