Fix some magic numbers in gyro board code.

Were causing it not to clear interrupts properly.

Also added new constants for recalibrated photosensor and
reenabled gyro-sensor-receiver.
diff --git a/bot3/input/gyro_sensor_receiver.cc b/bot3/input/gyro_sensor_receiver.cc
index 31863be..784827c 100644
--- a/bot3/input/gyro_sensor_receiver.cc
+++ b/bot3/input/gyro_sensor_receiver.cc
@@ -23,7 +23,7 @@
 namespace {
 
 const double kWheelRadius = 1.964;
-const double kTapeThickness = 2.696;
+const double kTapeThickness = 3.12;
 
 inline double drivetrain_translate(int32_t in) {
   return static_cast<double>(in) / (256.0 /*cpr*/ * 4.0 /*quad*/) *