Revert "Turn some C-style vararg into variadic templates"

This reverts commit r299925 because it broke the buildbots. See e.g.
http://lab.llvm.org:8011/builders/clang-cmake-armv7-a15/builds/6008

llvm-svn: 299928
diff --git a/llvm/lib/CodeGen/CountingFunctionInserter.cpp b/llvm/lib/CodeGen/CountingFunctionInserter.cpp
index 7f7350f..1e46a7a 100644
--- a/llvm/lib/CodeGen/CountingFunctionInserter.cpp
+++ b/llvm/lib/CodeGen/CountingFunctionInserter.cpp
@@ -41,7 +41,7 @@
       Type *VoidTy = Type::getVoidTy(F.getContext());
       Constant *CountingFn =
         F.getParent()->getOrInsertFunction(CountingFunctionName,
-                                           VoidTy);
+                                           VoidTy, nullptr);
       CallInst::Create(CountingFn, "", &*F.begin()->getFirstInsertionPt());
       return true;
     }