Merge "Revert "Revert "hammerhead: update prebuilt kernel""" into mnc-dev am: b161ef57a0  -s ours am: 800806c33d am: 1b25418641
am: d2e3a3b7a6

* commit 'd2e3a3b7a6dfffd00a5561e1c034ab7b83438865':
  Revert "Revert "hammerhead: update prebuilt kernel""