Fix some issues reported by lintian

Fix some issues reported by lintian

• Refer to common license file for CC0-1.0. (copyright-does-not-refer-to-common-license-file)

• Set upstream metadata fields: Bug-Database, Bug-Submit, Repository, Repository-Browse. (upstream-metadata-file-is-missing, upstream-metadata-missing-bug-tracking, upstream-metadata-missing-repository)

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/lintian-fixes.

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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/lintian-fixes/pkg/libxmlb/234b778b-df0d-464c-a8c3-8ad6db04c806.

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/60/c80e434a8327fe96e3948265763fed44a2f939.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/96/be8fdb53804178c0c3af0d8b7904ef9a6c20bd.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/f7/a49fe903fc6d3f850835457c09ffb3848671b8.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/7e/96cc297d0ff7057ff997cee3e282750787668d.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/aa/862f6be80f3c43d76609aaaa9b2f9996201c53.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/f7/bc38b519f4a34b311cbe010e860f52342917b8.debug

No differences were encountered between the control files of package **gir1.2-xmlb-2.0**

No differences were encountered between the control files of package **libxmlb-dev**

Control files of package libxmlb-dev-dbgsym: lines which differ (wdiff format)

• Build-Ids: f7bc38b519f4a34b311cbe010e860f52342917b8 60c80e434a8327fe96e3948265763fed44a2f939

No differences were encountered between the control files of package **libxmlb-tests**

Control files of package libxmlb-tests-dbgsym: lines which differ (wdiff format)

• Build-Ids: aa862f6be80f3c43d76609aaaa9b2f9996201c53 f7a49fe903fc6d3f850835457c09ffb3848671b8

No differences were encountered between the control files of package **libxmlb2**

Control files of package libxmlb2-dbgsym: lines which differ (wdiff format)

• Build-Ids: 7e96cc297d0ff7057ff997cee3e282750787668d 96be8fdb53804178c0c3af0d8b7904ef9a6c20bd

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