Just fruit, or vegetables too? There’s a lot of salt-tolerant vegetables, but fruits are mostly trail nibbles. Off the top of my head, I recall the following fruits: Pigface (Carpobrotus glaucescens, a little dragonfruit-like thing that supposedly tastes like a slightly salty sweet fig), Cocoplum, and Coconut. Ximenia and Cut Nut might be salt-tolerant as well, but I’m not sure, I gotta re-check. There’s more salt-tolerant fruits out there, but I’d have to check my files to remember them, and my computer’s out of commission for the moment (I’m on a phone typing this).