Fix failure to fetch crash logs in macOS logic tests
Fix failure to fetch crash logs in macOS logic tests

Summary: This was broken in D29877449 (https://github.com/facebook/idb/commit/5f7caf3289f8f0af10a915a64513782f99156829), but now fixed for macOS tests.

Reviewed By: jbardini

Differential Revision: D30012487

fbshipit-source-id: 19d7195c14afe3e54be5c50e96cd463cd01304a9

facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl