fix build issue

Signed-off-by: Ntaiyipei <peitaiyi@huawei.com>

app/bundle.json

@@ -27,10 +27,10 @@
         },
         "build": {
             "sub_component": [
-                "//applications/sample/wifi-iot/app"
+                "//applications/sample/wifi-iot/app:app"
             ],
             "inner_kits": [],
             "test": []
         }
     }
-}
+}
\ No newline at end of file