Ahaggar: Code cleaning - remove OO style

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>
Ahaggar: rename gcc_log.py to log.py

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>
Ahaggar: remove the useless self argument

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>
Ahaggar: add GCC tree.def file from gcc-4.8.0

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