Add final runtime and disk usage summary to mail reports

tools/build-update-package.py

@@ -11,7 +11,7 @@ import tarfile
 
 ROOT = Path(__file__).resolve().parents[1]
 FILES = ['install.sh', 'update.sh', 'README.md', 'Dokumentation.md', 'UPDATE_ANLEITUNG.md',
-         'lib/common.sh', 'lib/locking.sh', 'lib/backup_set.py', 'lib/report.py', 'lib/update-discover.py',
+         'lib/common.sh', 'lib/locking.sh', 'lib/backup_set.py', 'lib/report.py', 'lib/usage.py', 'lib/update-discover.py',
          'usr-local-sbin/app-backup.sh', 'usr-local-sbin/app-restore.sh',
          'systemd/app-backup.service', 'systemd/app-backup.timer', 'logrotate/app-backup',
          'etc/app-backup/app-backup.conf']