Eo: Migrate to the new syntax (Eo4) and adjust the EFL

Eo: Migrate to the new syntax (Eo4) and adjust the EFL

This is a merge commit for all of the relevant changes.

The syntax is described in: https://phab.enlightenment.org/w/eo/

Summary:
eo_do(obj, a_set(1)) -> a_set(obj, 1)
eo_do_super(obj, CLASS, a_set(1)) -> a_set(eo_super(obj, CLASS), 1)

eo_do_*_ret() set of functions are no longer needed.

This is the first step, the next step would be to also fix up eo_add()
which currently still uses the old syntax and is not 100% portable.