stub

As documented at:
https://msdn.microsoft.com/en-us/vba/excel-vba/articles/application-operatingsystem-property-excel

Change-Id: I2ccf17c698eb631e7b5ca420752b2268d2142d2a
Reviewed-on: https://gerrit.libreoffice.org/39208Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tamás Bunth <btomi96@gmail.com>