Plugin change -- add another method for optionally uploading a failed run marker

[rrnewton]

Rather than having no rows in the table for failed runs, we could upload a row that indicates a run was attempted but failed. For example, it could have a time, arguments, parameters, but all the results fields would be empty.

These are easy to filter out later (e.g. MEDIANTIME>=0); so there's really no harm in having them. Further, they may help automated tools or analysis in the future that try to determine when a benchmark dataset is "complete".