Make spit spit the feed roller too.

This might help us unjam in competition better.

Change-Id: I98aa271db7a70f197e1ac9c9452eed2c4384dde1
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/y2020/control_loops/superstructure/superstructure_goal.fbs b/y2020/control_loops/superstructure/superstructure_goal.fbs
index 990234a..f2b9096 100644
--- a/y2020/control_loops/superstructure/superstructure_goal.fbs
+++ b/y2020/control_loops/superstructure/superstructure_goal.fbs
@@ -55,6 +55,9 @@
 
   // Positive is deploying climber and to climb; cannot run in reverse
   climber_voltage:float (id: 10);
+
+  // Feed voltage override.
+  feed_voltage_override:float (id: 13);
 }
 
 root_type Goal;