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

Change-Id: I7d8e3be80f04ec0a9d1dbd394ac0e2ab2f1a4551

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