Update v2.5 changelog

Change-Id: Ied41698b4c5d7be508af489e793c088a5b58d016
Reviewed-on: http://gerrit.aldebaran.lan/22445
Reviewed-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
Tested-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
qibuild v2.5

Change-Id: I4df0bcabc33d4f90bbe3a96f8cd86a5d6ff1b525