[libstdc++] Patch ping

[Jan Hubicka]

Hello,
I would like to ping the following three patches.

https://gcc.gnu.org/pipermail/libstdc++/2024-December/060113.html

this patch essentially mirrors recent improvements to std::vector
template to the bool variant. It speeds up push_back measurably.

https://gcc.gnu.org/pipermail/libstdc++/2024-December/060189.html

This patch optimizes the way we construct std::string from C-style
string so it gets fully inline for small strings where local buffer is
used and there is no need for new/delete pair.

https://gcc.gnu.org/pipermail/libstdc++/2024-December/060243.html

This patch saves a conditinal jump in expansion of std::vector<bool>'s
operator [] by avoiding use of iterators where [] operator can accept
negative values.

Thanks,
Honza