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/MachineOutliner.cpp b/llvm/lib/CodeGen/MachineOutliner.cpp
index 581a8ad..2f54630 100644
--- a/llvm/lib/CodeGen/MachineOutliner.cpp
+++ b/llvm/lib/CodeGen/MachineOutliner.cpp
@@ -1098,7 +1098,7 @@
   // Create the function using an IR-level function.
   LLVMContext &C = M.getContext();
   Function *F = dyn_cast<Function>(
-      M.getOrInsertFunction(NameStream.str(), Type::getVoidTy(C)));
+      M.getOrInsertFunction(NameStream.str(), Type::getVoidTy(C), nullptr));
   assert(F && "Function was null!");
 
   // NOTE: If this is linkonceodr, then we can take advantage of linker deduping