Update OSLogFullOptTest for TargetConstantFolding.
Update OSLogFullOptTest for TargetConstantFolding.

The difference is that these bitcast operations are no longer sunk to their uses:
  %5 = bitcast %swift.refcounted* %1 to %swift.opaque*

The reason is that TargetConstantFolding removes a conditional branch. Then CodeSinking no longer sinks:
  %20 = struct $String (%19 : $_StringGuts)

roambotics/swift,apple/swift,glessard/swift,JGiola/swift,glessard/swift,apple/swift,glessard/swift,roambotics/swift,JGiola/swift,JGiola/swift,roambotics/swift,glessard/swift,benlangmuir/swift,glessard/swift,apple/swift,roambotics/swift,glessard/swift,benlangmuir/swift,JGiola/swift,benlangmuir/swift,roambotics/swift,benlangmuir/swift,apple/swift,benlangmuir/swift,apple/swift,roambotics/swift,JGiola/swift,JGiola/swift,apple/swift,benlangmuir/swift