* Brazil's cost of bank loans hits 5-year high, defaults up * Brazilian real slides 1% * Latam FX down 1.6%, stocks off 1.9% By Bansari Mayur Kamdar Dec 27 (Reuters) - Brazilian real extended losses on Tuesday for a second day against a firmer dollar, while investors assessed data in Latin America's largest economy highlighting worsening credit conditions. The real slid 1.0% against a rebounding dollar . Central bank data showed borrowing costs in bank loans in Brazil rose in November to the...