Add @codingStandardsIgnoreFile

This should cause PHP CodeSniffer to ignore the file, so that no long line
warnings and errors are reported like in
https://integration.wikimedia.org/ci/job/mwext-Translate-phpcs-lenient/132/console.
If this works, I need to make the alias file export of the Translate
extension add this to all aliases files.

Change-Id: I641b9ccdc606ec0485e84466671be9d5f5048374