- make sure gfxterm and gfxmenu are embedded into grub loader module
- arm: berryboot fixes
  * berryboot can't read directories, thus we have to keep kernel
    and initrd and all other files on the toplevel of the fat32
  * berryboot does not pass ATAG_INITRD2 to the kernel, thus we
    have to set address and size ourselves
- Update copyBootCode function
  * Add support to check for /boot/dtb/ since DTB files
    will be stored in this folder