Set visibility for available_externally globals. This is important for two reasons:

* llvm-link would complains about mismatched visibility
* If we produce a relocation with an available_externally, it is good to know that
it is hidden.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124633 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index b8f91b4..00db261 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -174,8 +174,7 @@
 
   // Set visibility for definitions.
   NamedDecl::LinkageInfo LV = D->getLinkageAndVisibility();
-  if (LV.visibilityExplicit() || !GV->hasAvailableExternallyLinkage())
-    GV->setVisibility(GetLLVMVisibility(LV.visibility()));
+  GV->setVisibility(GetLLVMVisibility(LV.visibility()));
 }
 
 /// Set the symbol visibility of type information (vtable and RTTI)