am d816500c: am 8bec09ee: add \'extras\' mechanism to OTA and signing tools

Merge commit 'd816500cdd5ca4e017f2fe16fa9ec27205dc2e28' into eclair-mr2-plus-aosp

* commit 'd816500cdd5ca4e017f2fe16fa9ec27205dc2e28':
  add 'extras' mechanism to OTA and signing tools