Compile AvahiNetworkService.cxx only if Avahi is enabled
Compile AvahiNetworkService.cxx only if Avahi is enabled

Change-Id: Id5db47f9a7dc1d05f5e100b8367ba75ddd1f6dc8

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