[modules] Introduce v8::Module to the API and return it from CompileModule

src/api.h

Index: src/api.h
diff --git a/src/api.h b/src/api.h
index 26e47ccb52882455abba052c8c301a35ca5b7b6e..233be0ea9eeb8f6e7041923b4631cd47aa140b60 100644
--- a/src/api.h
+++ b/src/api.h
@@ -69,7 +69,6 @@ class RegisteredExtension {
   static RegisteredExtension* first_extension_;
 };
 
-
 #define OPEN_HANDLE_LIST(V)                  \
   V(Template, TemplateInfo)                  \
   V(FunctionTemplate, FunctionTemplateInfo)  \
@@ -101,6 +100,7 @@ class RegisteredExtension {
   V(Symbol, Symbol)                          \
   V(Script, JSFunction)                      \
   V(UnboundScript, SharedFunctionInfo)       \
+  V(Module, Module)                          \
   V(Function, JSReceiver)                    \
   V(Message, JSMessageObject)                \
   V(Context, Context)                        \