[Bug libstdc++/121741] Using an abi_tag for libstdc++ hardening

[tkaminsk at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121741

--- Comment #3 from Tomasz Kamiński <tkaminsk at gcc dot gnu.org> ---
> So maybe we could use either always_inline or abi_tag on all hardened functions.

My intent was to suggest the same, I just do not want to bloat the binaries
with X defintions of vector::front with different harderining tags.