[Bug bootstrap/92661] [10 Regression] Bootstrap failure with builtin-types.def change

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92661

--- Comment #11 from Peter Bergner <bergner at gcc dot gnu.org> ---
I have a patch I'm testing for the second problem.  Basically, it verifies that
the builtin we are overloading has already been defined or not.  If it hasn't
(ie, it wasn't supported for some reason, like dfp being disabled), then we
skip defining this builtin too.