am 1e9d1c5d: am 25a1341f: Merge changes from topic \'fastboot\' into mnc-dev

* commit '1e9d1c5d':
  Don't say "update package missing" unless we mean it.
  'usb' doesn't need to be global in fastboot.
  Add "fastboot --version".
  libziparchive: fix fallocate failures
  Use base::WriteFully in zip_archive.
  libziparchive: fix clang build
  Avoid mapping output to memory while writing to a file.