watchman: migrate wildmatch test to gtest
watchman: migrate wildmatch test to gtest

Summary: This is the first step towards removing `watchman/thirdparty/tap.{cpp,h}`

Reviewed By: chadaustin

Differential Revision: D17775680

fbshipit-source-id: d6ac32c3b2489e1713fb132b0bb46d848c56811f

rsocket/rsocket-cpp,rsocket/rsocket-cpp,ReactiveSocket/reactivesocket-cpp,ReactiveSocket/reactivesocket-cpp,rsocket/rsocket-cpp,rsocket/rsocket-cpp,ReactiveSocket/reactivesocket-cpp