packaging: Change the timestamp of log rotation.

Changed the timestamp of the log rotation to make it more clear to a
user when the log was rotated.

Change-Id: I1d115f9ade4bd49245f4b26e7d96b8df582d110c
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=889751
Signed-off-by: Kiril Nesenko <knesenko@redhat.com>