Tawag Ng Tanghalan 1968 winner Nora Aunor appeared on GMA’s noontime show “Eat Bulaga” in a segment called Jack en Poy on March 11. The superstar chose this over being main judge on ABS-CBN’s “Tawag Ng Tanghalan sa Showtime,” a show that jumpstarted her career. Reports say TNT host Vice Ganda was the reason why Nora had to skip the gig on Saturday. Nora Aunor …