bullhead: update prebuilt kernel [ DO NOT MERGE ANYWHERE ] am: 5b795f3956  -s ours am: e5da47b2fa  -s ours am: 5c2b883008  -s ours
am: f81a1780cf  -s ours

Change-Id: I31482ef0348b582569bb7edc20a965c3d18281d8
tree: 618d10c7794b743597b375dd32d815a25a3b73a7
  1. Image.gz-dtb