disabled using the analog hall effects

The cape code needs to have a timeout on responses from the ADC so it
isn't so vulnerable to locking up.
diff --git a/frc971/constants.cc b/frc971/constants.cc
index bb6e391..31904f4 100755
--- a/frc971/constants.cc
+++ b/frc971/constants.cc
@@ -85,7 +85,7 @@
           kCompHighGearRatio,
           kCompLeftDriveShifter,
           kCompRightDriveShifter,
-          false,
+          true,
           control_loops::MakeVelocityDrivetrainLoop,
           control_loops::MakeDrivetrainLoop,
           // ShooterLimits