* Holdings of SPDR Gold Trust GLD, the world's largest gold-backed exchange-traded fund, fell 0.12% to 944.31 tonnes on Thursday. Oct 14 (Reuters) - Gold prices fell on Friday, adding to the weekly decline, as a hotter-than-expected U.S. inflation reading cemented bets of another hefty Federal Reserve interest rate hike next month. USD/US/ * Data released on Thursday showed U.S. consumer prices increased more than expected in September, as rents surged by the most since 1990 and the cost of food also rose, with core CPI jumping 6.6% on an annual basis.