re PR fortran/44054 (Handle -Werror, -Werror=, -fdiagnostics-show-option,...

re PR fortran/44054 (Handle -Werror, -Werror=, -fdiagnostics-show-option, !GCC$ diagnostic (pragmas) and color)

gcc/fortran/ChangeLog:

2014-10-06  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR fortran/44054
	PR fortran/54687
	* gfortran.h (gfc_warning_cmdline): Add overload that takes an
	option.
	(gfc_error_cmdline): Declare.
	* error.c (gfc_warning_cmdline): New overload that takes an option.
	(gfc_error_cmdline): New.
	* lang.opt (Wmissing-include-dirs): New.
	* scanner.c (add_path_to_list): Use the new functions.
	(load_file): Likewise.
	* options.c (gfc_init_options): Wmissing-include-dirs is enabled
	by default in Fortran.
	(gfc_handle_option): Accept automatically handled options.

From-SVN: r215974