build: fix days and dates in the %changelog of the spec-file (2nd part)

This prevents more unneeded build warnings like:

    warning: bogus date in %changelog: Mon Apr 22 2008 ...

Bug: 1000019
Change-Id: I1d59fb93806e25a4629ce027beec324d03702e15
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/5701
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>