am 3e747ac3: Add clean step for /system/bin/bugreport symlink

Merge commit '3e747ac3fe688c231bbf5591ee02226b394adf26' into eclair-plus-aosp

* commit '3e747ac3fe688c231bbf5591ee02226b394adf26':
  Add clean step for /system/bin/bugreport symlink