[Bug fortran/39030] Support -fexcess-precision={standard,fast} also for Fortran

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39030

--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
More than eight years later is there any point to keep this PR opened?