boot-deploy, mkinitfs: upgrade

Please test, a lot was changed in these new versions!

### mkinitfs changelog:

Breaking Changes:
        - drop support for osk-sdl (MR 42)
        - drop support loading modules from "deviceinfo_modules_initfs" (MR 38)

Features:
        - bootdeploy: support zboot kernel image (MR 44)


### boot-deploy changelog:

Features:
        - add support for generating dt.img (MR 52)
        - ci: add integration tests (MR 51)
        - add support for using /usr/share/misc/source_deviceinfo (MR 48)
        - systemd: prefer vmlinuz.efi over vmlinuz (MR 47)
        - pick up options for root fs from fstab (MR 41)

Fixes:
        - don't copy vmlinuz-dtb to /boot (MR 50)
        - place dtb in the /boot filesystem even if it's appended (MR 48)

cc @calebccff @TravMurav