loplugin:stringconstant: handle OUString+=OUString(literal)
loplugin:stringconstant: handle OUString+=OUString(literal)

Change-Id: I5af9cc77f0329148925ac1b4f0de1df7634a7e08

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