Fix layering violation by moving Analysis/CallGraph to Index

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90424 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/examples/wpa/clang-wpa.cpp b/examples/wpa/clang-wpa.cpp
index a0182c1..cca7907 100644
--- a/examples/wpa/clang-wpa.cpp
+++ b/examples/wpa/clang-wpa.cpp
@@ -12,11 +12,11 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Analysis/CallGraph.h"
-#include "clang/Frontend/ASTUnit.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/SourceManager.h"
+#include "clang/Frontend/ASTUnit.h"
 #include "clang/Frontend/CompilerInstance.h"
+#include "clang/Index/CallGraph.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace clang;