By Mollie Quirk Travis Barker’s son Landon Barker has revealed that he has been diagnosed with Tourette’s syndrome, with the youngster speaking out on social media. Blink-182 drummer Travis shares daughter Alabama Luella Barker and son Landon Asher Barker with his ex Shanna Moakler. And now 20-year-old Landon, who is a musician like his father, has shared the news of his diagnosis of Tourette’s with his fans. Taking to TikTok, Landon responded to a follower who commented on his post asking if he had Tourette’s. Speaking out, Landon said: “I figured I’d speak on this eventually. But yeah, I act…