mac-only UniString from sal_Unicode*
mac-only UniString from sal_Unicode*

Change-Id: If6432543c194668075b5b0a821e4bad8d7dd4839

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core