[Layering] Move InstVisitor.h into the IR library as it is pretty

obviously coupled to the IR.

llvm-svn: 203064

llvm/lib/Transforms/Scalar/Scalarizer.cpp

@@ -17,7 +17,7 @@
 #define DEBUG_TYPE "scalarizer"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/IR/IRBuilder.h"
-#include "llvm/InstVisitor.h"
+#include "llvm/IR/InstVisitor.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Transforms/Scalar.h"