Merge tag 'android-6.0.0_r26' into HEAD

Android 6.0.0 release 26

* tag 'android-6.0.0_r26':
  64bit emmc fix
  Actually encrypt stuff
  Actually encrypt stuff
  Don't encrypt lost+found
  Don't encrypt lost+found
  Add keyctl_revoke
  Add e4crypt_set_user_crypto_policies, calls vdc setusercryptopolicies
  Improve error logging.
  Don't apply default encryption to /data/user, it should get per-user encryption.

Change-Id: Ib98ac6fab6261f99dc6ab7ad040090535cdc5aca