NEW YORK (Reuters) - The dollar gained and global equity markets rose on Friday on upbeat U.S. economic data while amicable messages from Chinese President Xi Jinping and U.S. President Donald Trump helped defuse tensions over the prolonged U.S.-Sino trade war.Government bond yields mostly rose as U.S. manufacturing output accelerated in November to its fastest pace in seven months and a survey of purchasing managers showed services activity also picked up more than expected.Equity markets..