opkg: upgrade 0.7.0 -> 0.8.0

opkg: upgrade 0.7.0 -> 0.8.0

See release notes at
- http://downloads.yoctoproject.org/releases/opkg/opkg-0.8.0.release-notes

[0.8.0] - 2025-01-10

The minor version bump in this release is due to the changes to cURL error output line format.

- [Changed](https://git.yoctoproject.org/opkg/commit/?id=ab03377868256427279b36c4b2a298edae4260b8) the error output for the curl download backend, to now report the HTTP error code for failed requests.
  - e.g. `error: log_curl_download_error: Failed to download headers of https://foo.bar/all/Packages.gz: The requested URL returned error: 401`
- Enabling debug-verbosity, while using the cURL backend, [will now](https://git.yoctoproject.org/opkg/commit/?id=ce6fede3db931bb0da70d1334cdc4101d0aec702) print cURL's verbose error log to stderr when there is a download failure.
  - The verbose output may contain confidential information about your cURL transactions. So this is your reminder that debug-verbosity should not be enabled in production systems or sensitive security environments.
- The commandline configuration file option (`-f`) [can now](https://git.yoctoproject.org/opkg/commit/?id=36d08b93d2859992b624a4ba2f412cfa5c766050) be specified multiple times, and each configuration file will be loaded and their settings merged.
- [Fixed](https://git.yoctoproject.org/opkg/commit/?id=c87188d7535684fddb8cf80993c147b215602b63) a bug in control field parsing where custom fields whose keys are similar to other fields could be confused by the parser.

Signed-off-by: Etienne Cordonnier <ecordonnier@snap.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>