[core] enable UEFI NTFS support

* This allows no-sweat UEFI support of Windows installation ISOs
  that contain a >4GB file for instance
* This is done through UEFI:TOGO (https://github.com/pbatard/uefi-togo)
  and the efifs NTFS driver (http://efi.akeo.ie)
* Closes #414
* This will also be part of our implementation of #126