Generated files problems.

[FX Coudert]

> I'm aware that this only
> bails on the symptom and doesn't help in curing the actual cause of
> failing to detect the kinds, of course.

Your modification to the script is fine, but in any case the build  
will fail while trying to compile selected_int_kind.F90, which is  
built just a few files later than this script. If people think that  
difference is worth commit a patch, I'll do it. Opinions?

FX