[jdk26u] RFR: 8375065: Update LCMS to 2.18

[duke]

On Tue, 10 Feb 2026 04:58:33 GMT, Anupam Dev <adev at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [3871b889](https://github.com/openjdk/jdk/commit/3871b8899df79fa85619975bd1c7f59792a839d1) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Damon Nguyen on 9 Feb 2026 and was reviewed by Phil Race, Sergey Bylokhov and Jayathirth D V.
> 
> Thanks!

@anupamdev20 
Your change (at version 3c28adc82a706dc7be5c06d93ffa7791d7faf5de) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk26u/pull/43#issuecomment-3891641936