Update the pointer for vboot_reference so it can be used to compile depthcharge payload on the master branch. Change-Id: I5fc6e05896d7221a1e48ca86c6b15081488302b5 Signed-off-by: Duncan Laurie <dlaurie@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/39840 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>