[FIX] sap.ui.core.util.File.save JSDoc: Update browser limitations (Safari)
[FIX] sap.ui.core.util.File.save JSDoc: Update browser limitations (Safari)

Safari 10.1 supports the "download" attribute on anchor tags, so there
is no limitation anymore. However it is still valid for iOS Safari on
all versions.

Change-Id: Ic92b4beaf9853e15abaf24d985eeb5cd5258becf

olirogers/openui5,SQCLabs/openui5,cschuff/openui5,olirogers/openui5,SAP/openui5,SQCLabs/openui5,SQCLabs/openui5,SAP/openui5,cschuff/openui5,cschuff/openui5,olirogers/openui5,nzamani/openui5,nzamani/openui5,SAP/openui5,nzamani/openui5,SAP/openui5