bullhead: update prebuilt kernel [ DO NOT MERGE ] am: dc66ef5645  -s ours am: 4584c0628f am: 4437813d1a
am: 12d7742f56

Change-Id: I50e5e010511bf1b43d307af81565e2d37717931a
tree: 3440299988fed57705a360a407a9b7fdc1376801
  1. Image.gz-dtb