Incorrect JSC_UNDEFINED_VARIABLE when process_common_js_modules and dependency_mode=NONE

```
// a.js

import * as b from './b.js';
console.log(b.x);
```

```
// b.js

const x = /\/*/;
export { x };
```

```
java -jar compiler.jar \
--compilation_level=ADVANCED \
--dependency_mode NONE \
--process_common_js_modules \
--js ./b.js \
--js ./a.js
```

Expected output:
```
console.log(/\/*/);
```

Actual output:
```
./a.js:2:14: ERROR - [JSC_UNDEFINED_VARIABLE] variable x$$module$b is undeclared
2| console.log(b.x);
```

```
compiler.jar --version:
Closure Compiler (http://github.com/google/closure-compiler)
Version: v20210601
```

The following variants work as expected:
```
export const x = /\/*/;
const x = /.*/;
const x = /\//;
import { x } from './b.js';
```