Sort the #include lines for utils/...

I've tried to find main moudle headers where possible, but the TableGen
stuff may warrant someone else looking at it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169251 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/StringToOffsetTable.h b/utils/TableGen/StringToOffsetTable.h
index a098d7d..d94d3a2 100644
--- a/utils/TableGen/StringToOffsetTable.h
+++ b/utils/TableGen/StringToOffsetTable.h
@@ -11,8 +11,8 @@
 #define TBLGEN_STRING_TO_OFFSET_TABLE_H
 
 #include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringMap.h"
 #include "llvm/Support/raw_ostream.h"
 #include <cctype>