bmxtranswrap: add st426 manifest examine count option
bmxtranswrap: add st426 manifest examine count option

Added --st436-mf <count> option.

If --st436-mf 0 is used then input ANC tracks will always result
in output ANC tracks

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