NEW YORK (Reuters) - The dollar strengthened and a gauge of global stocks jumped, lifted by an unexpected rebound in U.S. manufacturing that helped temper fears that caused stocks overnight in Asia to plunge on the potential impact of the coronavirus in China. Gold fell more than 1%, retreating from a four-week high, as China's efforts to protect its economy from the virus and the injection of 1.2 trillion yuan ($174 billion) worth of liquidity into the markets helped stem inflows into..