8162546: change hidden options -Xdebug to --debug, -XshouldStop to --should-stop, and -diags to --diags
Reviewed-by: mcimadamore

8153407: javac, fold debug options
Reviewed-by: mcimadamore, jjg

8013576: Add stat support to LambdaToMethod
Summary: LambdaToMethod should emit info to help diagnose/test lambda metafactory problems
Reviewed-by: jjg, vromero