Merge changes If00669a7,Ia5504ed2 am: ddde4676b6
am: 50b7cfa5d7

* commit '50b7cfa5d7d9bdd1607c6c4276c63efa9e51e341':
  update_verifier: Log to logd instead of kernel log.
  Add update_verifier for A/B OTA update.