Apply hints suggested by the multi-arch hinter

Apply hints suggested by the multi-arch hinter.

These changes were suggested on https://wiki.debian.org/MultiArch/Hints.

This merge proposal was created automatically by the Janitor bot. For more information, including instructions on how to disable these merge proposals, see https://janitor.debian.net/multiarch-fixes.

You can follow up to this merge proposal as you normally would.

The bot will automatically update the merge proposal to resolve merge conflicts or close the merge proposal when all changes are applied through other means (e.g. cherry-picks). Updates may take several hours to propagate.

Build and test logs for this branch can be found at https://janitor.debian.net/multiarch-fixes/pkg/ubuntu-keyring/1318b611-bf4b-4f76-ba06-87f501307b09.

Debdiff

These changes affect the binary packages:

[The following lists of changes regard files as different if they have different names, permissions or owners.]

Files in second set of .debs but not in first

-rw-r--r--  root/root   DEBIAN/conffiles

Files in first set of .debs but not in second

-rwxr-xr-x  root/root   DEBIAN/preinst
-rwxr-xr-x  root/root   DEBIAN/prerm

Control files of package ubuntu-archive-keyring: lines which differ (wdiff format)

• Multi-Arch: foreign

No differences were encountered between the control files of package **ubuntu-cloud-keyring**

No differences were encountered between the control files of package **ubuntu-dbgsym-keyring**

No differences were encountered between the control files of package **ubuntu-keyring**

You can also view the diffoscope diff (unfiltered).