Update ATF codebase to a version that supports passing a timestamp and fix the format to what it accepts now (including quotes). This provides reproducible builds. Change-Id: I12a0a2ba1ee7921ad93a3a877ea50309136ab1ab Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Reviewed-on: https://review.coreboot.org/13726 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>