Add can grabber auto.

Change-Id: I47b2c93916018dce3923a8a66c1ac2c663d1f7a1
diff --git a/bot3/autonomous/auto.q b/bot3/autonomous/auto.q
index 3636d31..d529500 100644
--- a/bot3/autonomous/auto.q
+++ b/bot3/autonomous/auto.q
@@ -4,5 +4,10 @@
   // True if auto mode should be running, false otherwise.
   bool run_auto;
 };
-
 queue AutoControl autonomous;
+
+message CanGrabberControl {
+  // Voltage to send out to can grabbers.
+  double can_grabber_voltage;
+};
+queue CanGrabberControl can_grabber_control;