proper #include order.

llvm-svn: 44707
diff --git a/llvm/lib/Support/APFloat.cpp b/llvm/lib/Support/APFloat.cpp
index 5d2146d..66dd24e 100644
--- a/llvm/lib/Support/APFloat.cpp
+++ b/llvm/lib/Support/APFloat.cpp
@@ -12,9 +12,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/ADT/APFloat.h"
 #include <cassert>
 #include <cstring>
-#include "llvm/ADT/APFloat.h"
 #include "llvm/Support/MathExtras.h"
 
 using namespace llvm;