Merge "Revert "Revert "ART: Reference.getReferent intrinsic for x86 and x86_64"""
am: 85a19d8eca

* commit '85a19d8eca6ffb51cb6859a29eb5c36ac94ba648':
  Revert "Revert "ART: Reference.getReferent intrinsic for x86 and x86_64""

Change-Id: I295994127cc3188422945bf244abd1f9b140ef7d