[Bug c++/93687] Add mcf thread model to GCC on windows for supporting C++11 std::thread?

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93687

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 93688 has been marked as a duplicate of this bug. ***