[async-functions] support await expressions in finally statements

src/runtime/runtime-generator.cc

Index: src/runtime/runtime-generator.cc
diff --git a/src/runtime/runtime-generator.cc b/src/runtime/runtime-generator.cc
index 96486736e124b6fef046f0d56215bf8dcbb7265a..66f30a66328c950a9ecb04aa033e1d1425c9bd8c 100644
--- a/src/runtime/runtime-generator.cc
+++ b/src/runtime/runtime-generator.cc
@@ -32,6 +32,7 @@ RUNTIME_FUNCTION(Runtime_CreateJSGeneratorObject) {
   generator->set_receiver(*receiver);
   generator->set_register_file(*register_file);
   generator->set_continuation(JSGeneratorObject::kGeneratorExecuting);
+  generator->set_resume_mode(JSGeneratorObject::kNext);
   return *generator;
 }