[endurance] we have to put the "old" boot time into endurance pack
[endurance] we have to put the "old" boot time into endurance pack

After reboot, the endurance pack with snapshots remaining from previous
session was incorrectly marked as belonging to the current session.
mkosola/crash-reporter,mer-qa/crash-reporter,mer-qa/crash-reporter,mkosola/crash-reporter,mkosola/crash-reporter,mer-qa/crash-reporter,mkosola/crash-reporter