am 474a2449: (-s ours) hammerhead: update prebuilt kernel automerge: f5f67ce

* commit '474a2449b9e9e098d74973d019d1ea3d677a76da':
  hammerhead: update prebuilt kernel
tree: b74aa191ac219c45a56f93a9e56a4d76bd396e4f
  1. zImage-dtb