Integrated: JDK-8348598 : Update Libpng to 1.6.47

[Harshitha Onkar]

On Thu, 13 Mar 2025 00:27:46 GMT, Harshitha Onkar <honkar at openjdk.org> wrote:

> Upgraded Libpng to v1.6.47

This pull request has now been integrated.

Changeset: 6b82b42a
Author:    Harshitha Onkar <honkar at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/6b82b42a2116900b2125e03c1ffa0824d6062757
Stats:     4890 lines in 20 files changed: 1906 ins; 2195 del; 789 mod

8348598: Update Libpng to 1.6.47

Reviewed-by: azvegint, prr, erikj

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PR: https://git.openjdk.org/jdk/pull/24021