[PATCH] Do not emit thunks with available_externally linkage in comdats

[Derek Schuff]

Actually the other places that needed fixing were all quite straightforward,
so just fix them too. Also make maybeSetTrivialComdat take a GO instead of a GV.

We could maybe even just replace the maybeSetTrivialComdat that takes the Decl
too, but that's probably another CL.


http://reviews.llvm.org/D9580

Files:
  lib/CodeGen/CGDecl.cpp
  lib/CodeGen/CGVTT.cpp
  lib/CodeGen/CGVTables.cpp
  lib/CodeGen/CodeGenModule.cpp
  lib/CodeGen/CodeGenModule.h
  lib/CodeGen/ItaniumCXXABI.cpp
  test/CodeGenCXX/thunks.cpp

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