style: use system path for dbus headers

Use system path for dbus headers.

Change-Id: I08088eb0932de738fc410104c28847aaf78d95bd
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/sensors/host.hpp b/sensors/host.hpp
index e940469..3a8387d 100644
--- a/sensors/host.hpp
+++ b/sensors/host.hpp
@@ -1,12 +1,12 @@
 #pragma once
 
 #include "sensor.hpp"
-#include "xyz/openbmc_project/Sensor/Value/server.hpp"
 
 #include <memory>
 #include <mutex>
 #include <sdbusplus/bus.hpp>
 #include <sdbusplus/server.hpp>
+#include <xyz/openbmc_project/Sensor/Value/server.hpp>
 
 template <typename... T>
 using ServerObject = typename sdbusplus::server::object::object<T...>;