[asan] New transitional branch to port ASAN to trunk

[Steven Bosscher]

On Wed, Oct 10, 2012 at 10:20 PM, Diego Novillo wrote:
>         * tree-asan.c: New file.
>         * tree-asan.h: New file.

Nit: do we still need the "tree-" prefix? IMHO not.

Ciao!
Steven