am 6845d1e4: (-s ours) am 0ace48dd: (-s ours) hammerhead: update prebuilt kernel

* commit '6845d1e4df71914c2e0c323a363f4f5ee80b4819':
tree: b74aa191ac219c45a56f93a9e56a4d76bd396e4f
  1. zImage-dtb