feat: add sw64 support

[hudeng-go]

Summary by Sourcery

Add support for the SW64 (Sunway) architecture in Debian packaging by introducing a new patch and updating the patches series and changelog.

New Features:

• Add SW64 (Sunway) architecture support

Build:

• Update debian/patches/series to include the new sunway-support patch
• Add debian/changelog entry for SW64 support

[sourcery-ai]

Reviewer's Guide

This PR adds support for the sw64 (Sunway) architecture by introducing a new Debian patch, updating the packaging metadata (changelog and patch series), and implementing necessary build system and architecture detection changes.

File-Level Changes

Change	Details	Files
Debian packaging updated to include sw64 support	Added a new changelog entry for the sw64 feature release Included the new patch in the debian/patches/series list	debian/changelog debian/patches/series
New patch implements sw64 architecture support	Extended CPU/architecture detection to recognize sw64 Updated Autoconf/M4 macros to handle sw64 endianness and alignment Modified build scripts to include sw64-specific compiler and linker flags	debian/patches/add-sunway-support.patch

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[github-actions]

TAG Bot

TAG: 2.40.4-3deepin7
EXISTED: no
DISTRIBUTION: unstable

[hudeng-go]

/retest

[sourcery-ai]

Hey @hudeng-go - I've reviewed your changes and they look great!

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