hammerhead: update prebuilt kernel [DO NOT MERGE] am: 79297c72b9  -s ours am: 20b259cbbf am: 490968f3b8  -s ours
am: 5aad844595  -s ours

* commit '5aad84459569ba6ab19830c376ac721834870d4d':
  hammerhead: update prebuilt kernel [DO NOT MERGE]
tree: f0cd38b301d484d703b61094540fb09640bc2c43
  1. zImage-dtb