add .clang-format

Change-Id: I2c36b7886a25d0b235693b0776019d29608e1d52
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/elog_serialize.hpp b/elog_serialize.hpp
index f7f3bd9..eaa47d4 100644
--- a/elog_serialize.hpp
+++ b/elog_serialize.hpp
@@ -1,10 +1,12 @@
 #pragma once
 
+#include "config.h"
+
+#include "elog_entry.hpp"
+
+#include <experimental/filesystem>
 #include <string>
 #include <vector>
-#include <experimental/filesystem>
-#include "elog_entry.hpp"
-#include "config.h"
 
 namespace phosphor
 {