fortran-torture.exp (add-ieee-options): Replace ieee-options; do the uplevel thing and update additional_flags directly.

        * lib/fortran-torture.exp (add-ieee-options): Replace ieee-options;
        do the uplevel thing and update additional_flags directly.
        * gfortran.fortran-torture/execute/intrinsic_fraction_exponent.x,
        gfortran.fortran-torture/execute/intrinsic_nearest.x,
        gfortran.fortran-torture/execute/intrinsic_set_exponent.x,
        gfortran.fortran-torture/execute/nan_inf_fmt.x: Update to match.

From-SVN: r87399