Align menu on Admin Bar

Hello,
I use this following code to add a login link for logout user

function add_login_link( $meta = FALSE ) {
	global $wp_admin_bar, $blog_id;
	if ( is_user_logged_in() ) { return false; }
	$wp_admin_bar->add_menu( array(
		'id' => 'login_menu',
		'title' => __( 'Log in or Sign up' ),
		'href' => get_home_url( $blog_id, '/wp-login.php' ) )
	);
}
add_filter( 'show_admin_bar', '__return_true' ); /* turn on adminbar for logged out users */
add_action( 'admin_bar_menu', 'add_login_link', 15 );

However, thi Log in or Sign up link was put on the left. How to move it to the end right?