Add zeroing state to claw status messages.

Change-Id: I0144cb1455a3de5abca45e071c22f59cd4631e3f
diff --git a/frc971/control_loops/claw/claw.q b/frc971/control_loops/claw/claw.q
index 00c38c4..0105441 100644
--- a/frc971/control_loops/claw/claw.q
+++ b/frc971/control_loops/claw/claw.q
@@ -45,6 +45,7 @@
     bool estopped;
     // The internal state of the claw state machine.
     uint32_t state;
+    EstimatorState zeroing_state;
 
     // Angle of wrist joint.
     double angle;