Chinese state-owned banks have given the owners of failing Hong Kong Airlines a HK$4.4 billion loan, the group said in a filing to the Shanghai Stock Exchange late on Monday.HNA Group had earlier obtained the 4 billion yuan cash injection, and said the money would be used for aviation fuel, aircraft expenditure, operational expenses from flying, salaries and financing costs for HNA Holdings and its affiliated airlines.Without specifically saying the loan would be used to rescue HKA, earlier on…