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)

• Use secure URI in Homepage field. (homepage-field-uses-insecure-uri)

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

• Remove obsolete field Name from debian/upstream/metadata (already present in machine-readable debian/copyright).

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

• Update lintian override info format in d/berkeley-abc.lintian-overrides on line 2. (mismatched-override)

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

• Use secure URI in Homepage field. (homepage-field-uses-insecure-uri)

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

• Remove obsolete field Name from debian/upstream/metadata (already present in machine-readable debian/copyright).

• 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 (out-of-date-standards-version)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/berkeley-abc/3d376539-912e-4dda-a395-0cb8eb61b6ce.

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/33/8e7100d577a5ff6053147365bf4e38f6b822ca.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/f1/17f5a944dfcdb9c3224a04353109783379a391.debug

Control files of package berkeley-abc: lines which differ (wdiff format)

• Homepage: [-http​://www.eecs.berkeley.edu/~alanmi/abc/-] {+https​://www.eecs.berkeley.edu/~alanmi/abc/+}

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

• Build-Ids: f117f5a944dfcdb9c3224a04353109783379a391 338e7100d577a5ff6053147365bf4e38f6b822ca

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