Merge "Add a --copy-out flag for build.rs output files." am: 9dadd5899d am: 043d88799d am: e64b6aaecc

Original change: https://android-review.googlesource.com/c/platform/development/+/1473496

Change-Id: Ica3d42409cc9fe0440c32944ca17a9ab43d04140