Convert diagnostics to use quoting flag q 4/n
        * except.c (decl_is_java_type, build_throw,
        is_admissible_throw_operand, check_handlers_1,
        check_handlers):
        Use quoting formats.
        * friend.c (add_friend, make_friend_class, do_friend):
        Likewise.
        * init.c (sort_mem_initializers, emit_mem_initializers,
        member_init_ok_or_else, expand_member_init, is_aggr_type,
        build_offset_ref, build_java_class_ref): Likewise.

From-SVN: r88511