[Bug sanitizer/121222] add support for -fsanitize-coverage=stack-depth

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121222

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note this is hugely misnamed option. There is no sanitizing involved.