Merge changes I7839e334,Ie0407f65,Ifa3fb8cf,Icc0478cc

* changes:
  vndk-def: Add a.h.memory@1.0-impl to special list
  vndk-def: Add VNDK_VER to update_dataset.py
  vndk-def: Do not delete removed libs by default
  vndk-def: Add VNDK_VER suffix