[FrameworkBundle] Enabled translation:update for app folder

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| License       | MIT

Changed the Bundle requirement to allow the command to also be executed for the app/Resources
folder of the application, which currently cannot be achieved.

This patch should also work for previous versions.
We are using Yoda-conditions in Symfony: `null !== $input->getArgument('bundle')`