Alphabetize includes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63591 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
index 397f7b1..47aaf63 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
@@ -20,8 +20,8 @@
 #ifndef NDEBUG
 #include "llvm/ADT/SmallSet.h"
 #endif
-#include "llvm/CodeGen/ValueTypes.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
+#include "llvm/CodeGen/ValueTypes.h"
 #include "llvm/Support/CallSite.h"
 #include <vector>
 #include <set>