[Bug fortran/44054] Handle -Werror, -Werror=, -fdiagnostics-show-option

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44054

--- Comment #6 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 53552 has been marked as a duplicate of this bug. ***