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/pyupdate/default.nix

@@ -0,0 +1,28 @@
+{ lib, buildPythonPackage, fetchPypi, isPy3k
+, requests }:
+
+buildPythonPackage rec {
+  pname = "pyupdate";
+  version = "1.4.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "016f50853b4d72e5ddb963b042caa45fb60fa4d3f13aee819d829af21e55ef07";
+  };
+
+  propagatedBuildInputs = [ requests ];
+
+  # As of 0.2.16, pyupdate is intimately tied to Home Assistant which is py3 only
+  disabled = !isPy3k;
+
+  # no tests
+  doCheck = false;
+
+  meta = with lib; {
+    # This description is terrible, but it's what upstream uses.
+    description = "Package to update stuff";
+    homepage = "https://github.com/ludeeus/pyupdate";
+    license = licenses.mit;
+    maintainers = with maintainers; [ peterhoeg ];
+  };
+}