bullhead: update prebuilt kernel [ DO NOT MERGE ] am: 5b144a1d37  -s ours
am: 6a48c0ab0a

Change-Id: Ied3a9f66e5f40dbc09c525708085ecb42065bea9
tree: 10205ee0630e153490babdc7017726d4790ee94f
  1. Image.gz-dtb