Do not expand FusedAssignmentExpression by _InlineOptimizeCommand

This code is compile error same as #328.

```js
import "console.jsx";

class _Main {

    static function fn(a : number) : void {
		a += 2;
		console.log(a);
	}

    static function main(args : string[]) : void {
        _Main.fn(1);
    }
}
```

Do not expand FusedAssignmentExpression in the same way as AssignmentExpression and IncrementExpression.