trivial: Use lt_current rather than hardcoding the soname directory name

[hughsie]

Summary by CodeRabbit

• Bug Fixes
  • Updated installed header and pkg-config locations to use a versioned subdirectory consistently, improving compatibility across library versions.
  • Ensured generated build metadata points to the same version-aware path as installed headers.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 81f4dacd-b02a-4104-8f6e-18736f051baa

📥 Commits

Reviewing files that changed from the base of the PR and between 92c9fbc and 16a037e.

📒 Files selected for processing (1)

• src/meson.build

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📝 Walkthrough

Walkthrough

The build configuration in src/meson.build is updated so header installation directories and pkg-config generated subdirs use a versioned libxmlb-@0@ path formatted with lt_current, replacing the previously fixed libxmlb-2 path.

Changes

Build Subdirectory Versioning

Layer / File(s)	Summary
Versioned install and pkg-config paths src/meson.build	Header install subdirectories and pkg-config `subdirs` are changed from a fixed `libxmlb-2` path to a versioned `libxmlb-@0@` path formatted with `lt_current`.

Estimated code review effort: 1 (Trivial) | ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the change to use lt_current for versioned soname directory paths instead of hardcoding libxmlb-2.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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