[Bug c++/79823] Address Sanitize compile,got undefined reference to '__asan' errors

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79823

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Also I think asan support was only added in GCC 5 for aarch64 (but I could be
wrong).