[sailfishapp_priv] Set app and organization name. Fixes JB#14207

This fixes problems with local data directories, QSettings and
Qt Quick Local Storage. The effect of setting the values is
verified with the "storage_locations" test that will output all
relevant storage locations that Qt builds out of app/orga names.
Merge pull request #2 from thp/launcher-appname-fix

[sailfishapp_priv] Set application name to fix QStandardPaths