Summary:
With this commit it is now possible for a class that inherits from a C# binding
class to be instantiated from native C code. It only has to provide a
constructor that receives an `Efl.Eo.EoWrapper.ConstructingHandle` struct,
and which calls the base binding constructor passing it.
For example:
`private Type(ConstructingHandle ch) : base(ch) {}`.
Add some test files to validate the proper behavior of this feature.
Add some small fixes in generation contexts in order to properly
generate base constructors.
Depends on D9070
Test Plan: `meson test` and `make check`
Reviewers: lauromoura, felipealmeida, segfaultxavi, woohyun, YOhoho
Reviewed By: YOhoho
Subscribers: YOhoho, cedric, #reviewers, #committers
Tags: #efl
Differential Revision: https://phab.enlightenment.org/D9071
Vitor Sousa