Added AchievementManager ResponseType EXPIRED_CONTEXT for when operation inputs change between when an operation is queued and executed, and MALFORMED_OBJECT for when an rcheevos process method goes wrong.

Source/Core/Core/AchievementManager.h

@@ -34,6 +34,8 @@ public:
     INVALID_REQUEST,
     INVALID_CREDENTIALS,
     CONNECTION_FAILED,
+    MALFORMED_OBJECT,
+    EXPIRED_CONTEXT,
     UNKNOWN_FAILURE
   };
   using ResponseCallback = std::function<void(ResponseType)>;