include unit tests and integration tests in the cmake build
include unit tests and integration tests in the cmake build

Summary: This enable test targets to be built and ran

Reviewed By: lnicco

Differential Revision: D17408942

fbshipit-source-id: 144d223bc3830d07a0420e9569d3166a8646cd9a

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly