Add __getattr__(), __setattr__(), __delattr__() to 2.7 threading.local().
Add __getattr__(), __setattr__(), __delattr__() to 2.7 threading.local().

fyquah95/typeshed,fyquah95/typeshed,li-dan/typeshed,euresti/typeshed,tharvik/typeshed,azag0/typeshed,tharvik/typeshed