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/enum-compat/default.nix

@@ -0,0 +1,20 @@
+{ lib, buildPythonPackage, fetchPypi, enum34 }:
+
+buildPythonPackage rec {
+  pname = "enum-compat";
+  version = "0.0.3";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "3677daabed56a6f724451d585662253d8fb4e5569845aafa8bb0da36b1a8751e";
+  };
+
+  propagatedBuildInputs = [ enum34 ];
+
+  meta = with lib; {
+    homepage = "https://github.com/jstasiak/enum-compat";
+    description = "enum/enum34 compatibility package";
+    license = licenses.mit;
+    maintainers = with maintainers; [ abbradar ];
+  };
+}