Convert diagnostics to use quoting flag q 1/n

    Convert diagnostics to use quoting flag q 1/n
        * error.c (locate_error): Ignore quoting flag q.
        * call.c (build_user_type_conversion_1,
        build_operator_new_call,
        build_object_call, op_error, build_conditional_expr,
        build_new_op, build_op_delete_call, enforce_access,
        convert_like_real, convert_arg_to_ellipsis, build_x_va_arg,
        convert_default_arg, build_over_call, build_new_method_call,
        joust, perform_implicit_conversion, initialize_reference): Use
        the
        quoting flag q.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@88465 138bc75d-0d04-0410-961f-82ee72b054a4