Fix AST serialization of reference-to-reference types. This previously caused
a crash when deserializing the AST for this:

  typedef char (&R);
    extern R &r;



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129358 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed