am 51e8d61f: (-s ours) am 9a555132: (-s ours) hammerhead: update prebuilt kernel

* commit '51e8d61fba64bec6f8abf0a253c973756fcba034':
tree: b74aa191ac219c45a56f93a9e56a4d76bd396e4f
  1. zImage-dtb