IRONORE/ BHP Group BHP.AX and Rio Tinto RIO.AX fell 0.5% and 0.3%, respectively. Dec 2 (Reuters) - Australian shares fell on Friday, tracking losses on Wall Street overnight, as a contraction in U.S. manufacturing activity for November overshadowed mild easing in inflation and solid consumer spending. S&P 500 .SPX and Dow Jones .DJI slid on Thursday after data showed U.S. manufacturing activity contracted for the first time in 2-1/2 years in November as higher borrowing costs weighed on demand.