Add time delay support to the scripts. TEST=Build and run on Galileo Gen2 Change-Id: I2c87977e2a2547e00769e59e1ee81fbbb5dff33f Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com> Reviewed-on: https://review.coreboot.org/14555 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>