update .clang-format header inclusion order

Added the header inclusion order to the .clang-format file generated
these changes.

Change-Id: Ia31b21d7ea451cac0309828006bc17c27cbd5bd5
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/test/message/native_types.cpp b/test/message/native_types.cpp
index eed7669..29dad22 100644
--- a/test/message/native_types.cpp
+++ b/test/message/native_types.cpp
@@ -1,8 +1,9 @@
-#include <gtest/gtest.h>
-#include <sdbusplus/message.hpp>
-#include <vector>
 #include <map>
+#include <sdbusplus/message.hpp>
 #include <unordered_map>
+#include <vector>
+
+#include <gtest/gtest.h>
 
 /* Suite tests that object_path and signature can be cleanly converted to
  * and from strings and used as container parameters.