external/icu: workaround -fsanitize=signed-integer-overflow warnings
external/icu: workaround -fsanitize=signed-integer-overflow warnings

Change-Id: I44b5d74a3c1addaec77e724a3e7356e3648fc10c

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