am 6a695324: am e5a8cd42: am 96604831: First possibly-working cut of dex-preopt.

Merge commit '6a695324a98add795cc07161e4cd480ba63c46eb' into dalvik-dev

* commit '6a695324a98add795cc07161e4cd480ba63c46eb':
  First possibly-working cut of dex-preopt.