[sledge] Make execution bound part of the work queue
[sledge] Make execution bound part of the work queue

Summary: No need for it to be global mutable state

Reviewed By: ngorogiannis

Differential Revision: D15468706

fbshipit-source-id: 840fa8c83

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