Update format compatible checking tool
Update format compatible checking tool

Summary: After introducing a less forward-compatible change, update the backward compatible checking tool.

Test Plan: Run it.

Reviewers: IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: IslamAbdelRahman, leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D55695

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