Add changes-5.1.1 file

Change-Id: I056aba05ab8e3e1c8ea9edde1a893bbade3d379a
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
Merge remote-tracking branch 'origin/release' into stable

Change-Id: I861d55430174471036b7e7e34202725ae6131490