[Bug bootstrap/64271] Minimal patches to bootstrap on NetBSD

[kuehro at gmx dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64271

--- Comment #10 from Kai-Uwe Eckhardt <kuehro at gmx dot de> ---
> And please CC libstdc++@gcc.gnu.org for the three libstdc++ patches.

Done.