Summary:
In the case when you have multiple future in flight related to one object, you
couldn't use the previous version of efl_future_then. Now all function calls
take a void* pointer that allow multiple future to have their private data
request data accessible in all the callback.
This should not break released API as Eo.h is not released yet and so
was efl_future_Eina_FutureXXX_then.
Depends on D7332
Reviewers: felipealmeida, segfaultxavi, vitor.sousa, SanghyeonLee, bu5hm4n
Reviewed By: segfaultxavi
Subscribers: #reviewers, #committers
Tags: #efl
Maniphest Tasks: T7472
Differential Revision: https://phab.enlightenment.org/D7379