- fix the #if conditionals
- accept comments in those files
- do not fail on empty package lists

Call binary_efi after binary_hooks to include the files after they have been customized by the binary hooks.

Use the xorriso syntax that doesn't create a GPT but does create an EFI
partition recorded in MBR. This one is know to work on MAC and on most
UEFI implementations (even if the lack of GPT makes it non-conforming in
theory).

Add the /usr/share/live/build/data/debian-cd/kali symlink that is currently manually created by Kali's build_all.sh script.

Fix binary_debian-installer step to use linux-image-* metapackages instead of linux-image-2.6-* which are gone.

Otherwise users opting for XFS and JFS and installing without network
won't have them and the (first) boot can be interrupted due to this.