Royal Trustco said in a Securities and Exchange Commission filing that it has raised its stake in Glendale-based GlenFed Inc. to 9.7% of the common shares outstanding . . . Japan's flag carrier turned private as Japan Air Lines officially shed the government controls that shaped policy for 34 years . . . Leslie Fay Cos. of New York has agreed in principle to acquire Philadelphia-based Albert Nipon Inc. No value was placed on the acquisition . . . Bankers Trust New York Corp., which added $700 million to its loan-loss reserves, said it expects its 1987 results to range from a loss of about $50 million to a profit of about $25 million instead of the $150-million to $200-million loss it had forecast . . . Scandinavian Airlines System said it has been holding talks with British Caledonian with a view to taking a stake in the British airline . . . The Italian fashion house Guccio Gucci S.p.A. said the investment banking firm Morgan Stanley Group had acquired a 3.3% stake in the Italian company on behalf of an unidentified investor.