Make drivetrain use generic localizer

This will lead into switching y2019 over to using the Localizer with
camera images.

Change-Id: I2790c09ed9e1cec8d6141c25a4b5a173c2ddc24c
diff --git a/y2016/control_loops/drivetrain/drivetrain_main.cc b/y2016/control_loops/drivetrain/drivetrain_main.cc
index e74ddea..12d8642 100644
--- a/y2016/control_loops/drivetrain/drivetrain_main.cc
+++ b/y2016/control_loops/drivetrain/drivetrain_main.cc
@@ -9,8 +9,11 @@
 int main() {
   ::aos::Init();
   ::aos::ShmEventLoop event_loop;
+  ::frc971::control_loops::drivetrain::DeadReckonEkf localizer(
+      ::y2016::control_loops::drivetrain::GetDrivetrainConfig());
   DrivetrainLoop drivetrain(
-      ::y2016::control_loops::drivetrain::GetDrivetrainConfig(), &event_loop);
+      ::y2016::control_loops::drivetrain::GetDrivetrainConfig(), &event_loop,
+      &localizer);
   drivetrain.Run();
   ::aos::Cleanup();
   return 0;