arch: add support for "corei7" Intel CPU optimisations

gcc support was added in version 4.6:
http://gcc.gnu.org/gcc-4.6/changes.html

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
3 files changed