Flash the light white when vision is locked

Flashing is easier to see, and we need feedback.

Change-Id: I5e827912947e7068feccafdc46eec49374087db8
diff --git a/y2019/control_loops/superstructure/BUILD b/y2019/control_loops/superstructure/BUILD
index 524a1ba..87afdfa 100644
--- a/y2019/control_loops/superstructure/BUILD
+++ b/y2019/control_loops/superstructure/BUILD
@@ -27,6 +27,7 @@
         ":superstructure_queue",
         ":vacuum",
         "//aos/controls:control_loop",
+        "//frc971/control_loops/drivetrain:drivetrain_queue",
         "//y2019:constants",
         "//y2019:status_light",
     ],
@@ -48,6 +49,7 @@
         "//frc971/control_loops:capped_test_plant",
         "//frc971/control_loops:position_sensor_sim",
         "//frc971/control_loops:team_number_test_environment",
+        "//frc971/control_loops/drivetrain:drivetrain_queue",
         "//y2019:status_light",
         "//y2019/control_loops/superstructure/intake:intake_plants",
     ],