[modules] Do basic linking.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 33c9bb870f26a176ab51f790ffb36e1af764e50d..ae0fa72fade46c60bdd5e09f4f17d55e06c9ad74 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -7961,6 +7961,17 @@ Object* ModuleInfoEntry::module_request() const {
   return get(kModuleRequestIndex);
 }
 
+ModuleInfo* Module::info() const {
+  DisallowHeapAllocation no_gc;
+  SharedFunctionInfo* shared;
+  if (code()->IsSharedFunctionInfo()) {
+    shared = SharedFunctionInfo::cast(code());
+  } else {
+    shared = JSFunction::cast(code())->shared();
+  }
+  return shared->scope_info()->ModuleDescriptorInfo();
+}
+
 FixedArray* ModuleInfo::module_requests() const {
   return FixedArray::cast(get(kModuleRequestsIndex));
 }