[PATCH] i386: Fix fmod/fmof/remainder/remainderf for gcc-12

[Florian Weimer]

* Adhemerval Zanella:

> The __builtin_fmod{f} and __builtin_remainder{f} were added on gcc 13,
> and the minimum supported gcc is 12.  This patch adds a configure test
> to check whether the compiler enables inlining for fmod/remainder, and
> uses inline assembly if not.
>
> Checked on i686-linux-gnu wih gcc-12.

Typo in commit message: fmo[d]f

Thanks,
Florian