[Bug c++/125642] [LoongArch] `__FRACT_FBIT__` predefined in C++ mode despite `_Fract` keyword being unsupported

[xry111 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125642

Xi Ruoyao <xry111 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |xry111 at gcc dot gnu.org

--- Comment #7 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
Fixed for trunk.  Will backport to active branches if no objection.