Fix bug in optimized named function expressions on 3.4 branch.

src/hydrogen.cc

Index: src/hydrogen.cc
===================================================================
--- src/hydrogen.cc	(revision 9206)
+++ src/hydrogen.cc	(working copy)
@@ -2443,6 +2443,14 @@
     graph()->SetArgumentsObject(object);
     environment()->Bind(scope->arguments(), object);
   }
+  // Handle implicit declaration of the function name in named function
+  // expressions before other declarations.
+  if (scope->is_function_scope() && scope->function() != NULL) {
+    if (!scope->function()->IsStackAllocated()) {
+      return Bailout("unsupported declaration");
+    }
+    environment()->Bind(scope->function(), graph()->GetConstantHole());
+  }
 }