A$AP Rocky, his new documentary is a chance to tell his truth, and he feels «truly blessed» to have the support of his celebrity friends and girlfriend,Rihanna.Rocky spoke with ET on the carpet ahead of premiere at the Tribeca Film Festival in New York on Sunday, and he opened up about the film and his ladylove's appearance in it.When asked how important it was to have Rihanna's support for the doc, Rocky said it was «important having that support in real life, you know?»«It's amazing and I'm