Malaysia’s anti-graft agency is investigating allegations by Britain’s Serious Fraud Office (SFO) that Airbus paid a bribe of US$50 million to win plane orders from AirAsia, it said on Saturday.The SFO said on Friday that Airbus had failed to prevent individuals associated with it bribing executives linked to AirAsia Group and its long-haul arm, AirAsia X.AirAsia said it had never made any purchase decisions that were premised on an Airbus sponsorship, and that it would fully cooperate with…