bullhead: update kernel prebuilt[ DO NOT MERGE ] am: b6708ca998  -s ours am: ae8a995f36
am: b6d9785668

Change-Id: I209f179d085fda5617471523c1ad154d15b7d9a2
tree: a4b12606105d541035b5154e7b57f5af69299645
  1. Image.gz-dtb