sysui: build slackware stuff only on Linux
sysui: build slackware stuff only on Linux

Change-Id: I1ffcbd5ebf560f9f7ba8ad4b1ec9fefdb32da487

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