Add changes-5.1.1 file

Change-Id: Ie1c9020281ce5e0d591c0bc9393d4fe0babd6745
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
Merge remote-tracking branch 'origin/release' into stable

Change-Id: I64a312169c1234a0a26a582bde2c08bb7e9c718e