Merge "Revert "Revert "Make run-test default to optimizing compiler."""
am: 435a668ad1

* commit '435a668ad16ce13293074b2281a8c5b5f0e845a9':
  Revert "Revert "Make run-test default to optimizing compiler.""

Change-Id: I66d38dd6c350a50a794fdbdf20abc98a42b50363