am 17a47098: use MEMGETBADBLOCK to look for bad blocks when reading MTD partitions

Merge commit '17a47098d2a4214397f8b30e2692c9487d7ab5ff' into eclair-plus-aosp

* commit '17a47098d2a4214397f8b30e2692c9487d7ab5ff':
  use MEMGETBADBLOCK to look for bad blocks when reading MTD partitions