Someone once asked me what constituted a “summer jam” and my answer was simple: If you think Sinbad would be into it at Reggae Sunsplash. But since then, I’ve never really longed to be a West Coast beach dude, but the former Bones Brigader and California-based guitarist makes the kind of optimistic, unpretensious and sun-baked soul that can lead to relocation. I mean, the Dodgers…