Merge "ART: Check whether an oat file exists before opening"
am: d9d54c57e0

* commit 'd9d54c57e061a7ec650ce2088d7d3658b93f6c65':
  ART: Check whether an oat file exists before opening

Change-Id: Ie140e2c05a6febe224deecd334fea57f112bb141