Fix some issues reported by lintian

Fix some issues reported by lintian

• Trim trailing whitespace. (trailing-whitespace)
• Bump debhelper from old 11 to 13. (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)
• Update standards version to 4.6.0, no changes needed. (out-of-date-standards-version)
• Update standards version to 4.6.2, no changes needed. (out-of-date-standards-version)

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/9f/5a9346e7d39a646c15039c36c31fe164fddc06.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/ba/be3805f06d86689b975ee733374e4984611394.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/0d/a9d32014698529d064f8e8ef88e1e5ccd8d809.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/9e/c2a3b10fde58ff7b45af5695173160b73a0ae8.debug

Control files of package flashrom: lines which differ (wdiff format)

• Depends: libc6 (>= 2.33), 2.34), libftdi1-2 (>= 1.2), libpci3 (>= 1:3.5.1), 1:3.8.0), libusb-1.0-0 (>= 2:1.0.22)

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

• Build-Ids: 9ec2a3b10fde58ff7b45af5695173160b73a0ae8 9f5a9346e7d39a646c15039c36c31fe164fddc06

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

Control files of package libflashrom1: lines which differ (wdiff format)

• Depends: libc6 (>= 2.33), libftdi1-2 (>= 1.2), libpci3 (>= 1:3.5.1), 1:3.8.0), libusb-1.0-0 (>= 2:1.0.22)

Control files of package libflashrom1-dbgsym: lines which differ (wdiff format)

• Build-Ids: 0da9d32014698529d064f8e8ef88e1e5ccd8d809 babe3805f06d86689b975ee733374e4984611394

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This merge proposal was created by the Janitor bot, and it will automatically rebase or close this proposal as appropriate when the target branch changes. Any comments you leave here will be read by the Janitor's maintainers.

Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/flashrom/0bdc2c8f-8220-4189-a015-f911c3afa03f.