[esnext] prototype runtime implementation for async functions

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index bdf20a12c914da22f57f0f50985bd73a908858b3..2c0c222a8210b19e617ecebd6dd30571fe273703 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -429,7 +429,7 @@ void EnsureFeedbackVector(CompilationInfo* info) {
 
 bool UseIgnition(CompilationInfo* info) {
   if (info->is_debug()) return false;
-  if (info->shared_info()->is_generator() && !FLAG_ignition_generators) {
+  if (info->shared_info()->is_resumable() && !FLAG_ignition_generators) {
     return false;
   }