tweak README for Linux a bit
tweak README for Linux a bit

Change-Id: I60769987b1e81cbef0e78662af781309c0b9aaca

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