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

llvm-svn: 203064
diff --git a/llvm/lib/Analysis/InstCount.cpp b/llvm/lib/Analysis/InstCount.cpp
index 876d49b..3d05556 100644
--- a/llvm/lib/Analysis/InstCount.cpp
+++ b/llvm/lib/Analysis/InstCount.cpp
@@ -15,7 +15,7 @@
 #include "llvm/Analysis/Passes.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/IR/Function.h"
-#include "llvm/InstVisitor.h"
+#include "llvm/IR/InstVisitor.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"