Merge "vold: write bootloader message directly." into nyc-dev am: cbedcc3
am: 008c7dd

* commit '008c7ddb1fe7743f780801c1cf219a3c25445401':
  vold: write bootloader message directly.

Change-Id: I10a098025619c4f32db3ce551a4b85e14a9558a8