Make _ZTI symbols hidden.  This speeds up the dynamic linker.

llvm-svn: 89185
diff --git a/clang/lib/CodeGen/CGRtti.cpp b/clang/lib/CodeGen/CGRtti.cpp
index 9ebb908..4a9779a 100644
--- a/clang/lib/CodeGen/CGRtti.cpp
+++ b/clang/lib/CodeGen/CGRtti.cpp
@@ -165,6 +165,7 @@
       OGV->replaceAllUsesWith(NewPtr);
       OGV->eraseFromParent();
     }
+    GV->setVisibility(llvm::GlobalVariable::HiddenVisibility);
     return llvm::ConstantExpr::getBitCast(GV, Int8PtrTy);
   }