[Bug driver/78863] [6/7 Regression] error on -fsanitize suggests invalid -fsanitize=all

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78863

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 40381
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40381&action=edit
Untested patch