Meghan Trainor is officially a mom of two! The pop star and her husband, Daryl Sabara, welcomed their second child on July 1. In an Instagram post, Trainor, said Barry Bruce Trainor “was a big boy at 8lbs 7oz…and sideways (transverse), but we had an amazing, successful c-section, and I finally got my skin to skin time!” She then sent a “thank you to all of the incredible doctors and nurses who took such great care of us.” Barry’s birthday is the “7 year anniversary of our first…