SuccessChanges

Summary

  1. [XCOFF] Add back extern template declarations (details)
Commit 03495a988da919c975e1635f7e42c8399d71abff by rnk
[XCOFF] Add back extern template declarations
The extern template declarations were fine. The duplicate explicit
instantiations were both in the .cpp file.
The file was modifiedllvm/include/llvm/Object/XCOFFObjectFile.h