Made KF data available to polydrivetrain.

Change-Id: I067d0d05b9fc32d6ad50fbd35a6e9ad07b63f20d
diff --git a/y2014/control_loops/drivetrain/drivetrain.h b/y2014/control_loops/drivetrain/drivetrain.h
index 7ecc09f..489b4ca 100644
--- a/y2014/control_loops/drivetrain/drivetrain.h
+++ b/y2014/control_loops/drivetrain/drivetrain.h
@@ -38,9 +38,9 @@
   double last_gyro_heading_ = 0.0;
   double last_gyro_rate_ = 0.0;
 
+  StateFeedbackLoop<7, 2, 3> kf_;
   PolyDrivetrain dt_openloop_;
   DrivetrainMotorsSS dt_closedloop_;
-  StateFeedbackLoop<7, 2, 3> kf_;
 
   double last_left_voltage_ = 0;
   double last_right_voltage_ = 0;