am ab21f57f: (-s ours) am 01b95e73: (-s ours) hammerhead: update prebuilt kernel

* commit 'ab21f57f303b50cc25754359a4be66a2ae1e7fd4':
tree: b74aa191ac219c45a56f93a9e56a4d76bd396e4f
  1. zImage-dtb