rpm: fix date in %changelog

When building rpms, the following warning is printed:

  warning: bogus date in %changelog: Thu Jun 29 2014 Humble Chirammal <hchiramm@redhat.com>

This orginates from the following change:
> Change-Id: I4988a025bd18716fd6d355431196540e140224b3
> Reviewed-on: http://review.gluster.org/8116

The date of the change was the 19th, not the 29th. Correcting the date and the
order of the changelog entries prevents this warning.

Change-Id: Ied2d25ae3c81c58ec8ab35ff54be169ba6428ed6
BUG: 1108669
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/8551
Reviewed-by: Lalatendu Mohanty <lmohanty@redhat.com>
Reviewed-by: Humble Devassy Chirammal <humble.devassy@gmail.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>