fix: install lbzip2 in trixie-slim Dockerfiles to unblock libusb extraction

[Copilot]

Debian trixie's tar package ships with /etc/tar/default.cfg that routes .bz2 decompression through lbzip2. Since lbzip2 was absent from the build images, extracting libusb-1.0.23.tar.bz2 failed across all trixie-based targets:

tar (child): lbzip2: Cannot exec: No such file or directory
tar: Child returned status 2
tar: Error is not recoverable: exiting now

Changes

• x64/Dockerfile, x86/Dockerfile, arm64/Dockerfile, loongson/Dockerfile: add lbzip2 to the apt-get install list in the build stage

arm and x86Legacy were unaffected — they use i386/debian:wheezy, which predates this tar/lbzip2 default.

[Copilot]

Pull request overview

Adds the missing lbzip2 dependency to Debian trixie-slim build images so that tar can successfully extract .tar.bz2 sources (notably libusb-1.0.23.tar.bz2) under Trixie’s /etc/tar/default.cfg defaults.

Changes:

• Install lbzip2 in the build-stage apt-get install package list for all Trixie-based targets (x86, x64, arm64, loongson).
• Unblocks tar extraction failures caused by missing lbzip2 in those images.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
x86/Dockerfile	Adds lbzip2 to Trixie-based build dependencies so .bz2 extraction works.
x64/Dockerfile	Adds lbzip2 to Trixie-based build dependencies so .bz2 extraction works.
arm64/Dockerfile	Adds lbzip2 to Trixie-based build dependencies so .bz2 extraction works.
loongson/Dockerfile	Adds lbzip2 to Trixie-based bootstrap dependencies so .bz2 extraction works.

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