Merge changes from topic 'fastboot' into mnc-dev

* changes:
  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.