Flush tb in uc_close

uc.c

@@ -504,6 +504,9 @@ uc_err uc_close(uc_engine *uc)
         return UC_ERR_OK;
     }
 
+    // Flush all translation buffers or we leak memory allocated by MMU
+    uc->tb_flush(uc);
+
     // Cleanup internally.
     if (uc->release) {
         uc->release(uc->tcg_ctx);