Rewrite #includes for llvm/Foo.h to llvm/IR/Foo.h as appropriate to
reflect the migration in r171366.

Re-sort the #include lines to reflect the new paths.

llvm-svn: 171369
diff --git a/clang/lib/CodeGen/ItaniumCXXABI.cpp b/clang/lib/CodeGen/ItaniumCXXABI.cpp
index 6c14047..b761055 100644
--- a/clang/lib/CodeGen/ItaniumCXXABI.cpp
+++ b/clang/lib/CodeGen/ItaniumCXXABI.cpp
@@ -25,9 +25,9 @@
 #include "CodeGenModule.h"
 #include "clang/AST/Mangle.h"
 #include "clang/AST/Type.h"
-#include "llvm/DataLayout.h"
-#include "llvm/Intrinsics.h"
-#include "llvm/Value.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/Intrinsics.h"
+#include "llvm/IR/Value.h"
 
 using namespace clang;
 using namespace CodeGen;