Option to archive logs during a hang

[cdmihai]

When the job hangs, it times out and nothing gets archived. This is not optimal, since the hang might have been caused by the system under test in which case the logs would be useful.

[mmitche]

@cdmihai I think this will happen if you archive even on failure.

[cdmihai]

We have it set to archive on failures: https://github.com/Microsoft/msbuild/blob/master/netci.groovy#L51-L55
Yet timed out jobs do not archive: https://ci2.dot.net/job/Microsoft_msbuild/job/master/job/innerloop_OSX10.13_CoreCLR_prtest/260/