forget about the C++ Standard, use our own known goods
forget about the C++ Standard, use our own known goods

Android-ARM doesn't have std::copysign(), who knows what else will be
non-functioning on whatever platform..

Change-Id: I40e80c26f2892007caa3729bd0dda2733e875613

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