Convert libiberty to use ISO C prototype style 3/n.

    Convert libiberty to use ISO C prototype style 3/n.
        * cplus-dem.c (set_cplus_marker_for_demangling, consume_count,
        consume_count_with_underscores, code_for_qualifier,
        qualifier_string, demangle_qualifier, cplus_demangle_opname,
        cplus_mangle_opname, cplus_demangle_set_style,
        cplus_demangle_name_to_style, cplus_demangle, grow_vect,
        ada_demangle, internal_cplus_demangle, squangle_mop_up,
        work_stuff_copy_to_from, delete_non_B_K_work_stuff,
        delete_work_stuff, mop_up, demangle_signature,
        demangle_method_args, demangle_template_template_parm,
        demangle_expression, demangle_integral_value,
        demangle_real_value, demangle_template_value_parm,
        demangle_template, arm_pt, demangle_arm_hp_template,
        demangle_class_name, demangle_class,
        iterate_demangle_function,
        demangle_prefix, gnu_special, recursively_demangle,
        arm_special,
        demangle_qualified, get_count, do_type, demangle_fund_type,
        do_hpacc_template_const_value, do_hpacc_template_literal,
        snarf_numeric_literal, do_arg, remember_type, remember_Ktype,
        register_Btype, remember_Btype, forget_B_and_K_types,
        forget_types, demangle_args, demangle_nested_args,
        demangle_function_name, string_need, string_delete,
        string_init,
        string_clear, string_empty, string_append, string_appends,
        string_appendn, string_prepend, string_prepends,
        string_prependn,
        string_append_template_idx): Use ISO C prootype style.
        * cp-demint.c (cplus_demangle_fill_component,
        cplus_demangle_fill_builtin_type,
        cplus_demangle_fill_operator,
        cplus_demangle_v3_components): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@97109 138bc75d-0d04-0410-961f-82ee72b054a4