Implement support for template template parameter packs, e.g.,

  template<template<class> class ...Metafunctions>
    struct apply_to_each;



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122874 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/ASTWriterDecl.cpp b/lib/Serialization/ASTWriterDecl.cpp
index add6cd3..ff1f4bf 100644
--- a/lib/Serialization/ASTWriterDecl.cpp
+++ b/lib/Serialization/ASTWriterDecl.cpp
@@ -1011,6 +1011,7 @@
   // Rest of TemplateTemplateParmDecl.
   Writer.AddTemplateArgumentLoc(D->getDefaultArgument(), Record);
   Record.push_back(D->defaultArgumentWasInherited());
+  Record.push_back(D->isParameterPack());
   Code = serialization::DECL_TEMPLATE_TEMPLATE_PARM;
 }