Core/DBLayer: Support using mysql 8

src/server/database/Database/MySQLThreading.h

@@ -22,8 +22,9 @@
 
 namespace MySQL
 {
-    void TC_DATABASE_API Library_Init();
-    void TC_DATABASE_API Library_End();
+    TC_DATABASE_API void Library_Init();
+    TC_DATABASE_API void Library_End();
+    TC_DATABASE_API char const* GetLibraryVersion();
 }
 
 #endif