[turbofan] Ship TurboFan with new.target references.

This correctly marks functions containing a new.target reference as
being disabled with Crankshaft, which would have bailed out anyways.
Also note that this will trigger TurboFan for such functions and hence
widens the TurboFan intake valve.

Review URL: https://codereview.chromium.org/1568763002

Cr-Commit-Position: refs/heads/master@{#33146}

src/ast/ast-numbering.cc

@@ -580,6 +580,7 @@ bool AstNumberingVisitor::Renumber(FunctionLiteral* node) {
     DisableOptimization(kFunctionWithIllegalRedeclaration);
     return Finish(node);
   }
+  if (scope->new_target_var()) DisableCrankshaft(kSuperReference);
   if (scope->calls_eval()) DisableOptimization(kFunctionCallsEval);
   if (scope->arguments() != NULL && !scope->arguments()->IsStackAllocated()) {
     DisableCrankshaft(kContextAllocatedArguments);