[Bug c/98217] Prefer a warning for when VLAs declared on stack

[svoboda at cert dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98217

--- Comment #5 from David Svoboda <svoboda at cert dot org> ---
Oops, the Clang bug entry is really here:
https://bugs.llvm.org/show_bug.cgi?id=48460