Avoid race between cmake and utf8_in_pwd tests
Avoid race between cmake and utf8_in_pwd tests

Summary:
The cmake test removes the _build dirs, and the utf8_in_pwd test
rsyncs them.

Reviewed By: akotulski

Differential Revision: D4375554

fbshipit-source-id: 3fa088c

ryoon/infer,jvillard/infer,jvillard/infer,ryoon/infer,xennygrimmato/infer,blzq/infer,ropas/infer,blzq/infer,xennygrimmato/infer,facebook/infer,xennygrimmato/infer,jsachs/infer,facebook/infer,blzq/infer,blzq/infer,facebook/infer,ropas/infer,jvillard/infer,facebook/infer,ryoon/infer,jsachs/infer,facebook/infer,jvillard/infer,ropas/infer,jsachs/infer,ropas/infer,jvillard/infer,facebook/infer,ryoon/infer,jsachs/infer,facebook/infer,ropas/infer,ryoon/infer,xennygrimmato/infer,jvillard/infer,jvillard/infer,xennygrimmato/infer,blzq/infer,xennygrimmato/infer,ropas/infer,jsachs/infer,xennygrimmato/infer,blzq/infer,jsachs/infer,ryoon/infer