shamu: update prebuilt kernel [ DO NOT MERGE ] am: 12232bcde7 am: b1677b2cf4
am: 28b951ea58  -s ours

Change-Id: I0eb67435836fbed7d7ca477487bcd43776e67819
tree: af4ec1c6e324ab3e618f8b27a47c74efd2962058
  1. zImage-dtb