Add ArrayRef constructor from None, and do the cleanups that this constructor enables

Patch by Robert Wilhelm.

llvm-svn: 181138
diff --git a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
index c6115e3..ec10751 100644
--- a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -1483,7 +1483,7 @@
       Module *M = II->getParent()->getParent()->getParent();
       Function *F = Intrinsic::getDeclaration(M, Intrinsic::donothing);
       InvokeInst::Create(F, II->getNormalDest(), II->getUnwindDest(),
-                         ArrayRef<Value *>(), "", II->getParent());
+                         None, "", II->getParent());
     }
     return EraseInstFromFunction(MI);
   }