PR mi/10586

	PR mi/10586
	* varobj.c (ANONYMOUS_STRUCT_NAME): Define.
	(ANONYMOUS_UNION_NAME): Define.
	(is_path_expr_parent): New function.
	(get_path_expr_parent): New function.
	(is_anonymous_child): New function.
	(create_child_with_value): If the child is anonymous and without
	a name, assign an object name to it.
	(c_describe_child): Use get_path_expr_parent to determine
	the parent expression.
	If there field represents an anonymous struct or union and
	has no name, set an appropriate display name and expression.
	(cplus_describe_child): Likewise.