Python3.6: Fixups for annotations
Python3.6: Fixups for annotations

* Handling of assigning annotations was regressed after the locals dict
  changes, checking for the wrong node type now.

* Also ignore non-simple declarations (those are ones in braces).

kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka