RESCALE zero point as inputs

Switch RESCALE op zero point from attributes to operands

  * update serialization library submodule

Change-Id: Icab0204f192f674a666bbe8011ca6ac37a60dbf3
Signed-off-by: Jeremy Johnson <jeremy.johnson@arm.com>
Signed-off-by: Peng Sun <peng.sun@arm.com>