[Bug driver/101103] -fsanitise=undef gives better help than -fsanitize=undef

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101103

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
-fsanitize*= doesn't take an enum but comma separated list of enums though.