Add changes-5.1.1 file

Change-Id: I619cadbd90dcc71b7f3b1f56acb86629fd7bd1b2
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
Merge remote-tracking branch 'origin/release' into stable

Change-Id: I663dcb98573fa55d69b73f3740aa54772c55ff14