Fix some issues reported by lintian

Fix some issues reported by lintian

• Trim trailing whitespace. (file-contains-trailing-whitespace)
• Set upstream metadata fields: Bug-Database, Repository, Repository-Browse. (upstream-metadata-file-is-missing)
• Update standards version to 4.4.1, no changes needed. (out-of-date-standards-version)

This merge proposal was created automatically by the Janitor bot.

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

Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/light-locker/012ab8c0-baba-45bb-a9cd-e96cf391e1b8.

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 .changes but not in first

-rw-r--r--  root/root   /usr/lib/debug/.build-id/3d/9069410f44bb218ac40e27370f4b6181fe8799.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/83/4cf586d064665a9b813c53dc1cc2892a3c62ed.debug

Files in first .changes but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/2b/6f0565108389a2133d086f48061f496adb47cf.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/86/310cef408bc9a697f825e1c720d62fade8a1c4.debug

No differences were encountered between the control files of package **light-locker**

Control files of package light-locker-dbgsym: lines which differ (wdiff format)

• Build-Ids: 2b6f0565108389a2133d086f48061f496adb47cf 86310cef408bc9a697f825e1c720d62fade8a1c4 3d9069410f44bb218ac40e27370f4b6181fe8799 834cf586d064665a9b813c53dc1cc2892a3c62ed

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