Exclude experimental/logging/example from the main folly_base rule
Exclude experimental/logging/example from the main folly_base rule

Summary: It's an example, not part of the main Folly library.

Reviewed By: yfeldblum

Differential Revision: D5304985

fbshipit-source-id: 7cfb95da5795af61e9307882f71836ef7fa5a463

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