Fix some issues reported by lintian

Fix some issues reported by lintian

• Set upstream metadata fields: Bug-Database. (upstream-metadata-missing-bug-tracking)
• Update standards version to 4.6.1, no changes needed. (out-of-date-standards-version)
• Update standards version to 4.6.2, no changes needed. (out-of-date-standards-version)

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   /usr/lib/debug/.build-id/f3/896348cc8801c18212739055d4c5b081492048.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/a3/020be1e72ebae15ab15819e2e3d54a400040ba.debug

No differences were encountered between the control files of package **osmose-emulator**

Control files of package osmose-emulator-dbgsym: lines which differ (wdiff format)

• Build-Ids: a3020be1e72ebae15ab15819e2e3d54a400040ba f3896348cc8801c18212739055d4c5b081492048

You can also view the diffoscope diff (unfiltered).

This merge proposal was created by the Janitor bot, and it will automatically rebase or close this proposal as appropriate when the target branch changes. Any comments you leave here will be read by the Janitor's maintainers.

Build and test logs for this branch can be found at https://janitor.debian.net/run/e67c1d3d-64db-40bf-9066-ab68d73472ef.