Add changes-5.1.1 file

Change-Id: I256a0624ba33c55bba2a400df42cd8ef66fc7394
Reviewed-by: Wouter Huysentruit <wouter.huysentruit@dzine.be>
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
Merge remote-tracking branch 'origin/release' into stable

Change-Id: I025901e52747805c61dc7edd40d5f2d067291bd0