* TSX up 56.95 pts, or 0.5 pct, to 11,383.03 * Gold miners lead gains; financials fall * Weak U.S. data boosts hopes of further Fed stimulus * Greek, Spain bank woes weigh on market By Jon Cook TORONTO, May 17 (Reuters) - Toronto's main stock index rebounded on Thursday a day after hitting a 2012 low, as gains from gold miners offset soft U.S. economic data and mounting worries about turmoil in Greece and Europe's fragile banking sector. Canada's sub-index of gold mini