RepositoryExternal.mk: add gb_ExternalProject__use_expat
RepositoryExternal.mk: add gb_ExternalProject__use_expat

Change-Id: I4cb6417ede15253de1815b3f58dd320ab5aee296

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