Upgrade to V8 3.6

Merge V8 at 3.6.6.11

Simple merge required updates to makefiles only.

Bug: 5688872
Change-Id: Ib38b7ffbcd409585f6cb6fccc59c767029cecc77
diff --git a/src/v8threads.h b/src/v8threads.h
index 3ba823a..4002bb3 100644
--- a/src/v8threads.h
+++ b/src/v8threads.h
@@ -54,6 +54,7 @@
 
   // Get data area for archiving a thread.
   char* data() { return data_; }
+
  private:
   explicit ThreadState(ThreadManager* thread_manager);