cxx: generate a constructor with a parent and a lambda function

Authored by JackDanielZ on Sep 6 2017, 3:24 PM.

Description

cxx: generate a constructor with a parent and a lambda function

Until now, one could not invoke functions into the constructor of a
widget possessing a parent. It is needed for widgets such as Efl.Ui.Check
where style is needed during construction.

@fix T5980