evas_render: add restacked mapped obj to redraws rect

evas_render: add restacked mapped obj to redraws rect

Summary:
We are adding A object area to the redraws rect when object stack is changed
from (1) to (2) if A object is not mapped.

(1)
 ┌────────┐
 │Object A│┐
 └────────┘│
  └────────┘

(2)
 ┌────────┐
 │┌────────┐
 └│Object B│
  └────────┘

But if A object is mapped, then we are adding only part of A object area.

(part of A)
 ┌────────┐
 │┌───────┘
 └┘

So the result of stack change is (1) not (2).
This patch set is adding restacked mapped object to the restack_objects array,
after changing the stack of mapped object to add correct redraws rect.

Test Plan: Attached example code

Reviewers: Hermet, jsuya

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D9183

Change-Id: I571461a9dbf4dd67dd95d68ce47bf7ebef435a7a