fix sc_chart_regression_test build with system-libxml2
fix sc_chart_regression_test build with system-libxml2

Change-Id: I52a377835559a1577d5d6139d5a1443753396f5c

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