HACK: Retry/reboot when mount reports busy.

This is a hack because we don't know why mount() reports busy.

Requires dependent change in syste/core:
  https://googleplex-android-review.git.corp.google.com/#/c/543125/

Bug: 17358530

Change-Id: I8d3078bc68f8c450adce2c3a4101b6a958f1c4a0
1 file changed