[Bug fortran/88678] [9 regression] Many gfortran.dg/ieee/ieee_X.f90 test cases fail starting with r267465

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88678

--- Comment #20 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to nsz from comment #19)
> that code was there for a reason.. now aarch64 fails because it cannot
> detect if the flags are supported or not.
> 
> so if detection is turned off then on aarch64 "supports trapping" should
> always be false and likewise on any target that allows an implementation
> without trapping exceptions.

Yes. Please return 0 under appropriate ifdef.