Fix lintian overrides.

These lintian overrides need to be in the binary packages, not the source package. It is usually considered best to list each one individually, instead of a more generic entry that catches all of them, as that way, when there are changes upstream lintian will prompt you to review them and other legitimate package-contains-documentation-outside-usr-share-doc won't be automatically passed.

Note that I removed the source-is-missing tag because it isn't considered necessary to override experimental tags. That way, if they ever exit experimental status, and still flag the package, you will see them.

"If a tag is marked experimental, this means that the code that generates this message is not as well tested as the rest of Lintian, and might still give surprising results. Feel free to ignore Experimental messages that do not seem to make sense, though of course bug reports are always welcome (particularly if they include fixes)."

https://manpages.debian.org/stretch/lintian/lintian.1.en.html