Today is the birthday of Robert Osborne, the classy host of classic films on TCM for so many years. As a remembrance, the network tonight presents two relatively recent specials celebrating the late Osborne’s on-air impact as the face and spirit of Turner Classic Movies when it launched in 1994. The first, at 8 p.m. ET, is a very special edition of Private Screenings, in which co-host Alec Baldwin surprised Osborne in 2014 by making him the subject, not the host, of the show. Then, at 11:3