Make .watchmanconfig valid JSON (#2797)
Make .watchmanconfig valid JSON (#2797)

Summary:
Apparently newer versions of watchman start validating the `.watchmanconfig` for valid JSON.
Pull Request resolved: https://github.com/facebook/relay/pull/2797

Differential Revision: D16244618

Pulled By: kassens

fbshipit-source-id: 088912249a7e7d87d6dcdc445d6eb76111d787bb

cpojer/relay,iamchenxin/relay,cpojer/relay,wincent/relay,atxwebs/relay,josephsavona/relay,kassens/relay,xuorig/relay,voideanvalue/relay,voideanvalue/relay,voideanvalue/relay,kassens/relay,josephsavona/relay,wincent/relay,voideanvalue/relay,voideanvalue/relay,iamchenxin/relay,facebook/relay,wincent/relay,wincent/relay,yungsters/relay,atxwebs/relay,xuorig/relay,atxwebs/relay,facebook/relay,iamchenxin/relay,xuorig/relay,yungsters/relay,kassens/relay,wincent/relay,xuorig/relay,yungsters/relay,xuorig/relay,cpojer/relay,xuorig/relay,atxwebs/relay,voideanvalue/relay,wincent/relay,facebook/relay,cpojer/relay,josephsavona/relay,kassens/relay,facebook/relay,iamchenxin/relay,kassens/relay,facebook/relay,kassens/relay,facebook/relay