[Bug libstdc++/107135] array::at() method should not be in for freestanding C++

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107135

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 53662
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53662&action=edit
Define <bits/functexcept.h> function for freestanding

I think I prefer this direction.