Merge "Fix oat_writer to use WriteData which updates checksum." am: 81d53f5654
am: e946da2b10

* commit 'e946da2b109a7806b54683d2d9e7d84a683a503b':
  Fix oat_writer to use WriteData which updates checksum.

Change-Id: I4efbc096a89deb3ff58609eb396e25b35d25f78c