[Bug c/123623] Split out the extension that the Linux kernel uses from -fms-extensions

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123623

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note i would name it plan9 rather than ms ...