Code review comment for ~paelzer/ubuntu-archive-tools:identify-removals-from-rebuilds

Reminder for a debug session:
[16:56] <vorlon> cpaelzer: so a rerun of identify-removals-from-rebuilds is now reporting candidates that it wasn't reporting yesterday, by almost double... hmm. (example: chibi-scheme)
[16:57] <vorlon> cpaelzer: and chibi-scheme shouldn't be a candidate, the only build failure is an arch for which it's not built in lunar... dunno what's failed there when this check worked previously
[17:09] <cpaelzer> I didn't change any code yet
[17:09] <cpaelzer> since it checks various conditions, like versions in Debian/Ubuntu and such maybe any of that changed and makes it a candidate now
[17:10] <cpaelzer> I could download the ftbfs report, reduce it to just chibi-scheme and then via cmdline we can bump up the loglevel to understand more in detail why it is shown now