Fix --help output
Fix --help output

...cf. fe5527f1c6dc259af464a0593e86a2da2983b7ed "desktop, sysui: let
--convert-to imply --headless"

Change-Id: If4b22e17904acb5c5584c011c7ac00163aba5fed

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