RFR(M): 8200303: C2 should leverage profiling for lookupswitch/tableswitch

[Roland Westrelin]

> I included jdk tier1 testing in this round and one test 
> java/lang/Character/CheckScript.java failed. It passed with 
> -XX:-UseSwitchProfiling

Thanks for running testing again. It's not a bug in the new code. It's
some corner case of IfNode::fold_compares() that's not correctly
handled. I'll file a bug and send it for review.

Roland.