[deadcode] more portable `find` command
[deadcode] more portable `find` command

Summary: Unbreak Linux.

Reviewed By: ezgicicek

Differential Revision: D20894536

fbshipit-source-id: b9088798f

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