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/method.hpp b/src/method.hpp
index 7c29205..86326b6 100644
--- a/src/method.hpp
+++ b/src/method.hpp
@@ -1,8 +1,9 @@
 #pragma once
 
-#include <experimental/tuple>
 #include "callback.hpp"
 
+#include <experimental/tuple>
+
 namespace phosphor
 {
 namespace dbus
@@ -19,7 +20,8 @@
  *  @tparam DBusInterface - The DBus interface to use.
  *  @tparam MethodArgs - DBus method argument types.
  */
-template <typename DBusInterface, typename... MethodArgs> struct CallDBusMethod
+template <typename DBusInterface, typename... MethodArgs>
+struct CallDBusMethod
 {
     static void op(const std::string& bus, const std::string& path,
                    const std::string& iface, const std::string& method,