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/journal.hpp b/src/journal.hpp
index 249a7a2..e69a709 100644
--- a/src/journal.hpp
+++ b/src/journal.hpp
@@ -1,9 +1,10 @@
 #pragma once
 
-#include <phosphor-logging/log.hpp>
 #include "callback.hpp"
 #include "format.hpp"
 
+#include <phosphor-logging/log.hpp>
+
 namespace phosphor
 {
 namespace dbus
@@ -50,7 +51,8 @@
  */
 namespace detail
 {
-template <typename T> struct Display
+template <typename T>
+struct Display
 {
     static auto op(T&& value)
     {
@@ -58,7 +60,8 @@
     }
 };
 
-template <> struct Display<std::string>
+template <>
+struct Display<std::string>
 {
     static auto op(const std::string& value)
     {