Added special case for SetField enum and config to sym eval.
Added special case for SetField enum and config to sym eval.

logchi/LambdaS5,logchi/LambdaS5,brownplt/LambdaS5,brownplt/LambdaS5,logchi/LambdaS5,brownplt/LambdaS5,lijunsong/LambdaS5,lijunsong/LambdaS5,lijunsong/LambdaS5