utils: use gmtime_s for vs8 build
utils: use gmtime_s for vs8 build

ebu/ebu-bmx,xunchangguo/BMX,kierank/bmxlib-bmx,Limecraft/ebu-bmx,Limecraft/ebu-bmx,kierank/bmxlib-bmx,ebu/ebu-bmx,xunchangguo/BMX,Limecraft/ebu-bmx,xunchangguo/BMX,stuarthicks/bmx,stuarthicks/bmx,stuarthicks/bmx,ebu/ebu-bmx,kierank/bmxlib-bmx