Make retraced crash dumps available as build artifacts

If someone is proposing a merge to a touch application, and the application crashes during the acceptance test run, there's no way to know what happened.

This is especially vexing if the author of the code does not have access to the phone hardware.

It would be nice if the CI system could retrace the crash files present in /var/crash after each test run, and present them to the code author as build artifacts. At least this way, without access to the hardware, the author can see what went wrong.

Eventually these crash reports can be included in the autopilot subunit result stream for the test. until then, perhaps we can just get .txt files on the jenkins server?

Cheers,