[async-functions] support await expressions in finally statements

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index 29e77c6b6e4f34ce4e93a31c654a1cbe84d367ef..6dc3d60422acfb92f133ac926c11b2e8d2a00d82 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -11501,6 +11501,10 @@ void HOptimizedGraphBuilder::VisitGetIterator(GetIterator* expr) {
   UNREACHABLE();
 }
 
+void HOptimizedGraphBuilder::VisitInternalVariable(InternalVariable* expr) {
+  UNREACHABLE();
+}
+
 HValue* HOptimizedGraphBuilder::AddThisFunction() {
   return AddInstruction(BuildThisFunction());
 }