[async-iteration] add support for for-await-of loops in Async Functions

src/interpreter/constant-array-builder.h

Index: src/interpreter/constant-array-builder.h
diff --git a/src/interpreter/constant-array-builder.h b/src/interpreter/constant-array-builder.h
index b03b2d783f3729d3020b31da71254a219b234ac6..86e7c0818bbc48936377e78a010a6b191eb898dd 100644
--- a/src/interpreter/constant-array-builder.h
+++ b/src/interpreter/constant-array-builder.h
@@ -20,9 +20,10 @@ class AstValue;
 namespace interpreter {
 
 // Constant array entries that represent singletons.
-#define SINGLETON_CONSTANT_ENTRY_TYPES(V) \
-  V(IteratorSymbol, iterator_symbol)      \
-  V(HomeObjectSymbol, home_object_symbol) \
+#define SINGLETON_CONSTANT_ENTRY_TYPES(V)       \
+  V(IteratorSymbol, iterator_symbol)            \
+  V(AsyncIteratorSymbol, async_iterator_symbol) \
+  V(HomeObjectSymbol, home_object_symbol)       \
   V(EmptyFixedArray, empty_fixed_array)
 
 // A helper class for constructing constant arrays for the