Adds silent alarm clock to internal chronometer

As it is, you still want a watch even if you have an internal chronometer, to set an alarm with.

This adds that functionality to the bionic, slightly better than a wristwatch:
* It has an effective volume of 20, compared to 12 for a normal alarm. This is nice for heavy sleepers.
* It is silent to the outside world, so it won't attract unwanted attention.

It's a significant buff to the bionic, but still small enough that it doesn't feel like it makes it need a power cost. It just takes it from a novelty bionic to something worth installing rather than scrapping for parts.