Merge "ART: Add Makefile target for boot image" am: 336dd6a am: 81ec19f
am: b885060

* commit 'b885060fac18b543b8d33f6b19aaffb587604541':
  ART: Add Makefile target for boot image

Change-Id: Ibe479fdb03985b5fc9442783ee714a884ca586c6