Fix some issues reported by lintian

Fix some issues reported by lintian

• Bump debhelper from old 12 to 13. (package-uses-old-debhelper-compat-version)

• Update standards version to 4.6.0, no changes needed. (out-of-date-standards-version)

• Avoid explicitly specifying -Wl,--as-needed linker flag. (debian-rules-uses-as-needed-linker-flag)

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

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/xfce4-screensaver/0ff6199e-d302-45b3-8ee5-0cdb8b418810.

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/0b/9e03fd8d9774d40ac7350008ac52c3697c99bf.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/7a/22a07b5b21a5bf32b446f74690c2ed92d66100.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/7a/ea9dc4a7521aadda17b8f53b45543e8414ec0d.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/85/279a03cf15719c66454681de887cf73524f7ff.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/94/104b7d5b913a23c7cb1ab3fa82063cb783d6ef.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/c1/24465f32078c4f700ba7dbf006ec39ae1cdaff.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/c4/f2df501c3bd854b1f855cec29fe289fb2ccda9.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/fc/90045b0564792b7bb8c2fe1ae98216ab5538b6.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/00/4f828198ce88cf6c8a0f94856a91b73cc06dd5.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/34/96b699e96a1b16a535ad9120e377800c87d476.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/76/802a7602805010cc740adefc83ef38209a2f4e.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/7e/2ef6e2f643f6823e56f56f56d8e420ee1fa21a.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/92/0c85de58a127a56b9abf965d5e6bfb5be7b086.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/93/7522b31d8ed11b41e2c7337e2912a349377bdf.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/aa/9fbc254e8e055544e7f83b99fae9cefe70094f.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/c4/e7ba46531eca6c4e5729e2c8c408b2208e9f7c.debug

Control files of package xfce4-screensaver: lines which differ (wdiff format)

• Depends: libc6 (>= 2.33), 2.34), libcairo2 (>= 1.10.0), libdbus-1-3 (>= 1.9.14), libdbus-glib-1-2 (>= 0.78), libgarcon-1-0 (>= 0.1.2), libgdk-pixbuf-2.0-0 (>= 2.22.0), libgl1, libglib2.0-0 (>= 2.37.3), libgtk-3-0 (>= 3.21.4), libpam0g (>= 0.99.7.1), libpango-1.0-0 (>= 1.18.0), libsystemd0, libwnck-3-0 (>= 2.91.6), libx11-6, libxext6, libxfce4ui-2-0 (>= 4.13.0), libxfconf-0-3 (>= 4.6.0), libxklavier16 (>= 5.0), libxss1

Control files of package xfce4-screensaver-dbgsym: lines which differ (wdiff format)

• Build-Ids: 004f828198ce88cf6c8a0f94856a91b73cc06dd5 3496b699e96a1b16a535ad9120e377800c87d476 76802a7602805010cc740adefc83ef38209a2f4e 7e2ef6e2f643f6823e56f56f56d8e420ee1fa21a 920c85de58a127a56b9abf965d5e6bfb5be7b086 937522b31d8ed11b41e2c7337e2912a349377bdf aa9fbc254e8e055544e7f83b99fae9cefe70094f c4e7ba46531eca6c4e5729e2c8c408b2208e9f7c 0b9e03fd8d9774d40ac7350008ac52c3697c99bf 7a22a07b5b21a5bf32b446f74690c2ed92d66100 7aea9dc4a7521aadda17b8f53b45543e8414ec0d 85279a03cf15719c66454681de887cf73524f7ff 94104b7d5b913a23c7cb1ab3fa82063cb783d6ef c124465f32078c4f700ba7dbf006ec39ae1cdaff c4f2df501c3bd854b1f855cec29fe289fb2ccda9 fc90045b0564792b7bb8c2fe1ae98216ab5538b6

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