Link files to provide snprintf used by VBOOT code. Change-Id: I040c3952c22893da5aae11b20a618aa4006c6c58 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36053 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>