Complete the code for the driver's station Teensy

Change-Id: I0f1a365263a7eec2d355610c6722b3cd29dd0430
diff --git a/motors/usb/usb.cc b/motors/usb/usb.cc
index 4a1b115..482d2fd 100644
--- a/motors/usb/usb.cc
+++ b/motors/usb/usb.cc
@@ -130,7 +130,7 @@
   device_descriptor_->AddUint16(product_id);  // idProduct
   // Increment this whenever you need Windows boxes to actually pay attention to
   // changes.
-  device_descriptor_->AddUint16(7);  // bcdDevice
+  device_descriptor_->AddUint16(15);  // bcdDevice
   // We might overwrite these string descriptor indices later if we get strings
   // to put there.
   device_descriptor_->AddByte(0);  // iManufacturer