use PCH with generated cxx sources too
use PCH with generated cxx sources too

Change-Id: Ica342d70488f735fbaf94423cb425a91b359c9ca

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