am 8eef57b7: (-s ours) am a4758905: (-s ours) hammerhead: update prebuilt kernel

* commit '8eef57b720fc2b797529fb6319e1df0604f01dde':
tree: b74aa191ac219c45a56f93a9e56a4d76bd396e4f
  1. zImage-dtb