RFR: 8318388: Update libxslt to 1.1.39 [v2]

[Kevin Rushforth]

On Thu, 30 Nov 2023 08:37:35 GMT, Hima Bindu Meda <hmeda at openjdk.org> wrote:

>> Updated libxslt to v1.1.39. Verified build on all platforms.No issue seen.
>
> Hima Bindu Meda has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - update license for libxslt
>  - update libxslt.md

Reviewers: @kevinrushforth @johanvos @tiainen

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PR Comment: https://git.openjdk.org/jfx/pull/1298#issuecomment-1836160217