[jdk11u-dev] RFR: 8375063: Update Libpng to 1.6.54

[Andrew John Hughes]

On Thu, 22 Jan 2026 01:07:33 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [a2e74957](https://github.com/openjdk/jdk/commit/a2e749572e03dd394d123b701e163e3837472dd0) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Jayathirth D V on 21 Jan 2026 and was reviewed by Sergey Bylokhov and Phil Race.
> 
> Thanks!

Confirmed clean.

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Marked as reviewed by andrew (Reviewer).

PR Review: https://git.openjdk.org/jdk11u-dev/pull/3139#pullrequestreview-3760155173