Summary:
- Move to the newer and forward moving libzstd-dev
https://packages.ubuntu.com/search?suite=default&section=all&arch=any&keywords=libzstd&searchon=names

Reviewed By: wez

Differential Revision: D22981784

fbshipit-source-id: 3647357aad60f2335ea494c35c174e9ffec61346