update .clang-format

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

Change-Id: I4f51a20f469de431ee6a5ba78e3f4da39c980fab
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/src/propertywatchimpl.hpp b/src/propertywatchimpl.hpp
index 6500a15..2a44abc 100644
--- a/src/propertywatchimpl.hpp
+++ b/src/propertywatchimpl.hpp
@@ -1,12 +1,13 @@
 #pragma once
 
-#include <sdbusplus/message.hpp>
-#include <sdbusplus/bus/match.hpp>
-#include <vector>
 #include "callback.hpp"
 #include "data_types.hpp"
 #include "propertywatch.hpp"
 
+#include <sdbusplus/bus/match.hpp>
+#include <sdbusplus/message.hpp>
+#include <vector>
+
 namespace phosphor
 {
 namespace dbus