Refine collection of BlockDeclRefExprs.  WIP.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84787 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index 4a0df6b..42a6704 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -2757,8 +2757,8 @@
   //    struct __Block_byref_1_X *__forwarding;
   //    unsigned int __flags;
   //    unsigned int __size;
-  //    void *__copy_helper;
-  //    void *__destroy_helper;
+  //    void *__copy_helper;		// as needed
+  //    void *__destroy_help		// as needed
   //    int X;
   //  } *