[patch] Add -static-libgfortran to gcc.c and Fortran driver

[FX Coudert]

ping**2

The driver part is a one-liner (two lines with the comment change),  
and it's only copying the handling of -static-libgcc for -static- 
libgfortran. I'd really appreciate if a GWP could review it.

>> This change in the option name requires a one-line addition to gcc.c,
>> in order to validate this option that has a name that doesn't start
>> with -f. I don't know who exactly can approve this change, I think it
>> qualifies as "driver".
>>
>> Bootstrapped, regtested and manually tested on i686-linux. OK for
>> mainline? (for both the Fortran and gcc.c parts)

>> 2007-05-07  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
>>
>>        * gcc.c (process_command): Recognize the new -static- 
>> libgfortran
>>        option.
>>
>>
>> 2007-05-07  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
>>
>>        * lang.opt (static-libgfortran): New option.
>>        * gfortranspec.c (ADD_ARG_LIBGFORTRAN): New macro.
>>        (Option): Add OPTION_static and OPTION_static_libgfortran.
>>        (lookup_option): Handle the new -static-libgfortran option.
>>        (lang_specific_driver): Check whether -static is passed.
>>        Handle the new -static-libgfortran option.
>>        * options.c (gfc_handle_option): If -static-libgfortran is
>>        passed and isn't supported on this configuration, error out.