message: quic/state/StateData.h: mark overriding functions with "override"
  Summary:
  This avoids the following errors:
  quic/state/StateData.h:395:11: error: '~QuicConnectionStateBase' overrides a destructor but is not marked 'override' [-Werror,-Wsuggest-destructor-override]
diff: @@ -392,7 +392,7 @@ class LoopDetectorCallback;
  class PendingPathRateLimiter;
  struct QuicConnectionStateBase : public folly::DelayedDestruction {
  - virtual ~QuicConnectionStateBase() = default;
  + virtual ~QuicConnectionStateBase() override = default;
  explicit QuicConnectionStateBase(QuicNodeType type) : nodeType(type) {
  observers = std::make_shared<ObserverVec>();
  