[sledge] Add support for Freeze instruction
[sledge] Add support for Freeze instruction

Reviewed By: jvillard

Differential Revision: D27280744

fbshipit-source-id: f458dfa6e

jvillard/infer,facebook/infer,facebook/infer,facebook/infer,jvillard/infer,jvillard/infer,jvillard/infer,facebook/infer,facebook/infer,jvillard/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer