am 485bd44d: am d421f57d: Fix mkyaffs2image extra flags in the release tools.

Merge commit '485bd44d0d78f9f612075e17db1adb281741c84f'

* commit '485bd44d0d78f9f612075e17db1adb281741c84f':
  Fix mkyaffs2image extra flags in the release tools.