refactor: update math/base/special/log10 to freeBSD version 12.2.0

[gunjjoshi]

Description

What is the purpose of this pull request?

This pull request:

• updates existing JavaScript implementation to follow FreeBSD version 12.2.0.
• adds corresponding test.
• removed klog.js and related files, instead used kernelLog1p.

Related Issues

None.

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.

I have made slight modifications in that part too, which was common in both 9.3.0 and 12.2.0, based on what we have in log2, such as using toWords instead of getHighWord. This is because, after including a separate branch for checking log(1) = +0, our older code was not reaching that branch, though it gave the correct result. This was leading to a code coverage of less than 100%.

After the changes, it does well.

References:

• https://svnweb.freebsd.org/base/release/12.2.0/lib/msun/src/e_log10.c?revision=367086&view=markup
• https://svnweb.freebsd.org/base/release/9.3.0/lib/msun/src/e_log10.c?revision=268523&view=markup

Checklist

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

• Read, understood, and followed the contributing guidelines.

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@stdlib-js/reviewers

[kgryte]

LGTM. Thanks, @gunjjoshi!

[kgryte]

Also, thank you for including the reference links in the OP. That is quite useful, especially when looking back at changes and their rationale.