[RFA] Fix too many "no debugging symbols found" warnings.

[Tom Tromey]

>>>>> "Doug" == Doug Evans <dje@google.com> writes:

Doug> Maybe the thing to do is stick with the old format *if* using MI?
Doug> If/when an MI command is added frontends can then just use that instead.

I think that might be ok if we had a plan to remove the old code after
some time.  My concern is that we will otherwise end up with multiple
layers of old formatting code.

This particular function seems overdue for ui-out-ification.
This would let us keep the old version for MI[12], and then properly
evolve the output for future versions MI.

Tom