Support extended constant expressions (#4432)

* implement extended const expr (#4318)
* add a toggle to enable extended const on wamrc (#4412)

core/iwasm/common/wasm_loader_common.h

@@ -50,6 +50,11 @@ void
 wasm_loader_set_error_buf(char *error_buf, uint32 error_buf_size,
                           const char *string, bool is_aot);
 
+#if WASM_ENABLE_EXTENDED_CONST_EXPR != 0
+void
+destroy_init_expr_recursive(InitializerExpression *expr);
+#endif
+
 #ifdef __cplusplus
 }
 #endif