[Modules] Move CallSite into the IR library where it belogs. It is

abstracting between a CallInst and an InvokeInst, both of which are IR
concepts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202816 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/ShadowStackGC.cpp

@@ -29,10 +29,10 @@
 #include "llvm/CodeGen/GCs.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/CodeGen/GCStrategy.h"
+#include "llvm/IR/CallSite.h"
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/IntrinsicInst.h"
 #include "llvm/IR/Module.h"
-#include "llvm/Support/CallSite.h"
 
 using namespace llvm;