[Bug c++/86300] _Bool shouldn't be a keyword in C++

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86300

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
_Bool is in the implementation reserved namespace so it can be a keywork if an
implementation wants.