Clarify missing obsoletes reminder

Make it clearer that if calm has to provide missing obsoletes, that is a
packaging defect.

calm/package.py

@@ -834,6 +834,7 @@ def add_needed_obsoletes(needed):
                                 obsoletes.append(n)
                                 packages[p].version_hints[v]['obsoletes'] = obsoletes
                                 logging.info("added 'obsoletes: %s' to package '%s' version '%s'" % (n, p, v))
+                                logging.info("this should be in fixed in the cygport packaging")
 
                             # recurse so we don't drop transitive missing obsoletes
                             if n in mo: