FILO don't compile with an SSP enabled gcc

[montjoie]

On a SSP enabled gcc ( like on gentoo-hardened) FILO won't compile with lots of:
printf.c:(.text+0xdfd): undefined reference to `guard'
printf.c:(.text+0x115e): undefined reference to `guard'
printf.c:(.text+0x1177): undefined reference to `stack_smash_handler'
main/builtin.o: In function `elf_load':
(.text+0x275b): undefined reference to `guard'
main/builtin.o: In function `elf_load':
(.text+0x2a4a): undefined reference to `guard'
main/builtin.o: In function `elf_load':
(.text+0x2a63): undefined reference to `stack_smash_handler'
main/builtin.o: In function `grub_menulst':
(.text+0x3558): undefined reference to `guard'

[hailfinger]

Fixed in latest FILO.