Add very basic compatibility with folly locks for synchronized

Add very basic compatibility with folly locks for synchronized

Summary: Add folly locks to the HasLockUnlock struct so that they can be used inside Synchronized. acquireReadWrite() and releaseReadWrite() functions are added to each lock class so that their .lock and .unlock methods are accessible by Synchronized. These changes allow an extremely basic level of compatibility for the purpose of running benchmarks and so compatibility with dual_locking, etc. have not been tested.

Reviewed By: simpkins

Differential Revision: D3434621

fbshipit-source-id: d55cffbb1eccaf23645384b9a41f85c5df593ffe