add .clang-format

Change-Id: I6627b5569c2e0f730be7331403218b823a2c622f
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/sensors/builder.hpp b/sensors/builder.hpp
index edb30c3..78a578a 100644
--- a/sensors/builder.hpp
+++ b/sensors/builder.hpp
@@ -1,14 +1,12 @@
 #pragma once
 
-#include <map>
-#include <string>
-
 #include "sensors/manager.hpp"
 #include "sensors/sensor.hpp"
 
+#include <map>
+#include <string>
+
 /**
  * Build the sensors and associate them with a SensorManager.
  */
-SensorManager BuildSensors(
-    const std::map<std::string, struct sensor>& config);
-
+SensorManager BuildSensors(const std::map<std::string, struct sensor>& config);