eina: module - Add macros for adding module informations

eina: module - Add macros for adding module informations

Summary:
These macros allow you to define module informations like
author/description/version/license

e.g.
// Use "Name <email id>" or just "Name"
EINA_MODULE_AUTHOR("Enlightenment Community");
// Mention license
EINA_MODULE_LICENSE("GPL v2");
// What your module does
EINA_MODULE_DESCRIPTION("This is what this module does");
// Module version
EINA_MODULE_VERSION("0.1");

Now eina_modinfo can show these informations to users

$ eina_modinfo module.so
 version: 0.1
 description:   Entry test
 license: GPLv2
 author:  Enlightenment Community

@feature

Reviewers: cedric, tasn, raster, jpeg

Subscribers: seoz

Differential Revision: https://phab.enlightenment.org/D4257