Fix tests in CMake build
Fix tests in CMake build

Summary: The fix for this didn't get made before the commit landed.

Reviewed By: yfeldblum

Differential Revision: D5367593

fbshipit-source-id: 4ed9c781121d1b23db11d75d0f8d017d1d8663d9

rklabs/folly,facebook/folly,facebook/folly,rklabs/folly,rklabs/folly,rklabs/folly,facebook/folly,Orvid/folly,Orvid/folly,facebook/folly,rklabs/folly,Orvid/folly,Orvid/folly,facebook/folly,Orvid/folly