Fix socket transport status events

Bug(s):
https://bugzilla.mozilla.org/show_bug.cgi?id=1340164
(native in moebius)

netwerk/protocol/http/nsHttpTransaction.h

@@ -479,6 +479,8 @@ private:
     NetAddr                         mPeerAddr;
 
     bool                            m0RTTInProgress;
+
+    nsresult                        mTransportStatus;
 };
 
 } // namespace net