[Bug libstdc++/71367] std::time_get does not implement 'r' or 'p'

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71367

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Right, I think _M_extract_name already handles that.