Fix some issues reported by lintian

Fix some issues reported by lintian

• Mark debian/rules as executable.

• Bump debhelper from old 11 to 12. (package-uses-old-debhelper-compat-version)

• Set debhelper-compat version in Build-Depends. (uses-debhelper-compat-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.

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/lintian-fixes/pkg/libmpack-lua/80af766c-c8ed-4358-bc6f-3cfcef35ad9f.

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/09/66d2ff199b434f43451eaf8383ac649b59ad06.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/32/99928e2fa6ad357027bc4b919c11eb8d92c50e.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/54/903ef67a10e1b8beb0283eb5594bc3d1a64d09.debug
-rw-r--r--  root/root   /usr/lib/debug/.dwz/x86_64-linux-gnu/lua-mpack.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/5e/1382a546f440561d3e1356c474cb0ae1e1fa0f.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/61/c5801104e1ad7bb081dabd04808ccd1903c0dc.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/f7/d22bd0c8caeb980e15bf9e18b0fb1552af08be.debug

No differences were encountered between the control files of package **lua-mpack**

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

• Build-Ids: 5e1382a546f440561d3e1356c474cb0ae1e1fa0f 61c5801104e1ad7bb081dabd04808ccd1903c0dc f7d22bd0c8caeb980e15bf9e18b0fb1552af08be 0966d2ff199b434f43451eaf8383ac649b59ad06 3299928e2fa6ad357027bc4b919c11eb8d92c50e 54903ef67a10e1b8beb0283eb5594bc3d1a64d09

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