Longtime Wheel of Fortunehost Pat Sajak bid goodbye to viewers in an emotional clip shared hours before his final episode of the popular game shows airs on Friday, RadarOnline.com has learned. “Well, the time has come to say goodbye,” the 77-year-old TV personality began, The New York Postreports. “I have a few thanks and acknowledgments before I go, and I want to start with all of you watching out there.” “It’s been an incredible privilege to be invited into millions of homes night after night, year after year, decade after decade. And I’ve always felt that the privilege came with a responsib…