am 494203a6: (-s ours) hammerhead: update prebuilt kernel

* commit '494203a63495a3c75c76c418c5f818c149f7d6e9':
  hammerhead: update prebuilt kernel
tree: a10d09219f52cb6f4a49b6d5a83d600e399e7d27
  1. zImage-dtb