build: add support for building against specific gnu libc versions

[reubenmiller]

Proposed changes

Adjust the build.sh script to accept targets with the gnu libc version as a suffix.

This is a feature of cargo-zigbuild (see https://github.com/rust-cross/cargo-zigbuild?tab=readme-ov-file#specify-glibc-version). It is only intended for testing and experiments. It does not change the way the official binaries are built!

Examples

just release aarch64-unknown-linux-gnu.2.17

just release aarch64-unknown-linux-gnu.2.27

just release aarch64-unknown-linux-gnu.2.30

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (general improvements like code refactoring that doesn't explicitly fix a bug or add any new functionality)
• Documentation Update (if none of the other choices apply)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Paste Link to the issue

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA (in all commits with git commit -s)
• I ran cargo fmt as mentioned in CODING_GUIDELINES
• I used cargo clippy as mentioned in CODING_GUIDELINES
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
508	0	2	508	100	1h44m27.556103999s

[didier-wenzek]

Approved