am 1f030dcb: Update the cleanspec to clean libwebcore.

Merge commit '1f030dcba62978a8d81a84a5f26c36a2bbf79557' into eclair-plus-aosp

* commit '1f030dcba62978a8d81a84a5f26c36a2bbf79557':
  Update the cleanspec to clean libwebcore.