Ahaggar: add the doc directory and a quick README file

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>
Ahaggar: add libahaggar_fncalls.so example output

This is the result of compiling Linux kernel init/main with the
libahaggar_fncalls.so library.

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>