[Bug fortran/35707] Search /usr/local/include and /usr/include for .mod files

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35707

--- Comment #17 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 49138 has been marked as a duplicate of this bug. ***