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/threadloop/default.nix

@@ -0,0 +1,30 @@
+{ buildPythonPackage
+, fetchPypi
+, lib
+, tornado
+}:
+
+buildPythonPackage rec {
+  pname = "threadloop";
+  version = "1.0.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "8b180aac31013de13c2ad5c834819771992d350267bddb854613ae77ef571944";
+  };
+
+  propagatedBuildInputs = [
+    tornado
+  ];
+
+  doCheck = false; # ImportError: cannot import name 'ThreadLoop' from 'threadloop'
+
+  pythonImportsCheck = [ "threadloop" ];
+
+  meta = with lib; {
+    description = "A library to run tornado coroutines from synchronous Python";
+    homepage = "https://github.com/GoodPete/threadloop";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+  };
+}