Fix some issues reported by lintian

Fix some issues reported by lintian

• debian/copyright: use spaces rather than tabs to start continuation lines. (tab-in-license-text)

• Fix day-of-week for changelog entries 1.4.12-4, 1.4.8-1. (debian-changelog-has-wrong-day-of-week)

• Update standards version to 4.6.1, no changes needed. (out-of-date-standards-version)

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

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/ippl/74bebedc-6c91-4ae9-9968-353e6cfa3784.

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/be/5576c8b2218265f1faa90a6c1c6cd1a339f8d9.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/3c/2bfc85026f5af14e134917ac755687a5071e91.debug
-rwxr-xr-x  root/root   DEBIAN/preinst

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

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

• Build-Ids: 3c2bfc85026f5af14e134917ac755687a5071e91 be5576c8b2218265f1faa90a6c1c6cd1a339f8d9

You can also view the diffoscope diff (unfiltered).