[Bug libstdc++/68276] ios_base::_M_grow_words should use new (std::nothrow)

[ville.voutilainen at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68276

--- Comment #5 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
The enhancement PR is https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68989.