Add changes-5.1.1 file

Change-Id: I397cf428dcf41092673b6b45e1bf5bfb39db6cbf
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
Merge remote-tracking branch 'origin/release' into stable

Change-Id: I5d24c988e8c7d767e18e54344f001d1145e99a5b