Asia stocks lifted as Wall Street extends comeback

TOKYO (Reuters) - Asia stocks gained on Friday after Wall Street ended volatile trade in the green, adding to the big advances of the previous session, although lingering investor jitters helped support safe-haven currencies such as the yen.MSCI's broadest index of Asia-Pacific shares outside Japan rose 0.3 percent. It has fallen almost 4 percent so far in December.The Shanghai Composite Index edged up 0.3 percent.Australian stocks added 0.6 percent and South Korea's KOSPI climbed 0.5..