am 29c245e8: am e337093e: Merge changes from topic \'stash-size\' into mnc-dr-dev

* commit '29c245e803496625cb3b72719f1cdce8d73de041':
  Split large files for BBOTA v3.
  Revise stash for BBOTAs when needed.
  Assert the stash size when generating OTAs.