am 8ddb2873: Change hosttestlib to use ddm-prebuilt.

Merge commit '8ddb2873df96c7181c9358f5c9286e273648bf89' into gingerbread-plus-aosp

* commit '8ddb2873df96c7181c9358f5c9286e273648bf89':
  Change hosttestlib to use ddm-prebuilt.