LU-1032 build: fix typo in lustre-dkms.spec changelog

LU-1032 build: fix typo in lustre-dkms.spec changelog

Fix typo in the lustre-dkms.spec.in ChangeLog which has an
invalid date, and causes a build warning.

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: I6029c93928f84ff59c8798d2f8115e872c4cab07
Reviewed-on: https://review.whamcloud.com/26358
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Faccini Bruno <bruno.faccini@intel.com>
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>