A weightlifting first-timer pumped fresh blood to Team Philippines, which was making a last-ditch attempt to salvage fourth place Saturday night in the 31st Southeast Asian Games here. Good thing the old reliables in tennis and billiards delivered on their promise, giving the erstwhile overall champion four gold medals with just one day left in competition. The Philippines’ harvest now stands at 47 golds, 64 silvers and 86 bronzes. Singapore also ended the day with the same number of golds but its 47-44-65 dropped it to fifth place. Vietnam (173-102-100) continues to dominate in runaway fashio…