[iOS] Make xcpretty integration not default anymore, given that it has problems
[iOS] Make xcpretty integration not default anymore, given that it has problems

Summary: Closes #759

Reviewed By: jvillard

Differential Revision: D6323815

fbshipit-source-id: 09fe3f2

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