am 4d0b21f4: am 4833d9f4: init: builtins: trancate target file in do_copy

Merge commit '4d0b21f4ac5908f695c9c0759c3a34511d8fd97b'

* commit '4d0b21f4ac5908f695c9c0759c3a34511d8fd97b':
  init: builtins: trancate target file in do_copy