[async-await] (simpler) fix for Return in try/finally in async functions

src/parsing/preparser.h

Index: src/parsing/preparser.h
diff --git a/src/parsing/preparser.h b/src/parsing/preparser.h
index 3c72fcca1c113c150d85e0bf01a64510383ba9cf..0080246f3e92ab32436b46aa560991a2879ab444 100644
--- a/src/parsing/preparser.h
+++ b/src/parsing/preparser.h
@@ -670,6 +670,10 @@ class PreParserFactory {
                                         int pos) {
     return PreParserStatement::Jump();
   }
+  PreParserStatement NewAsyncReturnStatement(PreParserExpression expression,
+                                             int pos) {
+    return PreParserStatement::Jump();
+  }
   PreParserExpression NewFunctionLiteral(
       PreParserIdentifier name, Scope* scope, PreParserStatementList body,
       int materialized_literal_count, int expected_property_count,