test: add native add-on tests to math/base/special/log1pmx

[ujjwalv01]

Resolves part of #11352

Description

What is the purpose of this pull request?

This pull request:

• Adds test.native.js to @stdlib/math/base/special/log1pmx to execute unit tests for the package's C native addon implementation, mirroring the test assertions in the primary test.js file.

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

• test: migrate math/base/special/log1pmx to ULP-based testing #13979 (Follow-up)

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

• Yes
• No

If you answered "yes" above, how did you use AI assistance?

• Code generation (e.g., when writing an implementation or fixing a bug)
• Test/benchmark generation
• Documentation (including examples)
• Research and understanding

Disclosure

If you answered "yes" to using AI assistance, please provide a short disclosure indicating how you used AI assistance. This helps reviewers determine how much scrutiny to apply when reviewing your contribution. Example disclosures: "This PR was written primarily by Claude Code." or "I consulted ChatGPT to understand the codebase, but the proposed changes were fully authored manually by myself.".

---

@stdlib-js/reviewers

[kgryte]

LGTM. Thanks, @ujjwalv01!

[kgryte]

/stdlib update-copyright-years

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
math/base/special/log1pmx	$\\color{green}269/269$ $\\color{green}+100.00\\%$	$\\color{green}14/14$ $\\color{green}+100.00\\%$	$\\color{green}4/4$ $\\color{green}+100.00\\%$	$\\color{green}269/269$ $\\color{green}+100.00\\%$

The above coverage report was generated for the changes in this PR.