CNN will be airing the Glen Campbell documentary “I’ll Be Me” this weekend.  The film documents the country star’s decision to go public with his Alzheimer’s diagnosis and his farewell tours.  It was released last year and earned a Grammy award and an Oscar nomination for its theme song “I’m Not Gonna Miss You.”  Glen’s wife Kim and his daughter Ashley will appear on “New Day Friday” to speak on behalf of the ailing singer.  “I’ll Be Me” will air Sunday at 9 p.m. Eastern.