[jdk21u-dev] Integrated: 8329004: Update Libpng to 1.6.43

[Martin Doerr]

On Fri, 31 May 2024 15:57:54 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> Clean backport of [JDK-8329004](https://bugs.openjdk.org/browse/JDK-8329004).

This pull request has now been integrated.

Changeset: 4b0a7896
Author:    Martin Doerr <mdoerr at openjdk.org>
URL:       https://git.openjdk.org/jdk21u-dev/commit/4b0a789666e9ec8125467d7b3437900dd01fb889
Stats:     610 lines in 18 files changed: 258 ins; 120 del; 232 mod

8329004: Update Libpng to 1.6.43

Backport-of: 4e4229438ad2e8ac59ac675465e4d3d4e13bf156

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PR: https://git.openjdk.org/jdk21u-dev/pull/636