[Modules] Move CFG.h to the IR library as it defines graph traits over

IR types.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202827 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/ObjCARC/DependencyAnalysis.cpp

@@ -24,7 +24,7 @@
 #include "ObjCARC.h"
 #include "DependencyAnalysis.h"
 #include "ProvenanceAnalysis.h"
-#include "llvm/Support/CFG.h"
+#include "llvm/IR/CFG.h"
 
 using namespace llvm;
 using namespace llvm::objcarc;