[jdk8u-dev] RFR: 8295685: Update Libpng to 1.6.38

[Ekaterina Vergizova]

On Thu, 14 Sep 2023 20:27:03 GMT, Martin Balao <mbalao at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [d183dc25f7360c3012726acf8c03874df6fc41a4](https://github.com/openjdk/jdk11u-dev/commit/d183dc25f7360c3012726acf8c03874df6fc41a4) from the [openjdk/jdk11u-dev](https://github.com/openjdk/jdk11u-dev) repository.
> 
> This backport is a follow up fix of [JDK-8209115](https://bugs.openjdk.org/browse/JDK-8209115), and a dependency of [JDK-8305815](https://bugs.openjdk.org/browse/JDK-8305815).
> 
> This backport applied cleanly, except for the changes to the THIRD_PARTY_README files that are specific to 8u.
> 
> Note: Changes to src/java.desktop/share/native/libsplashscreen/libpng/UPDATING.txt were skipped because this file was not introduced by the 8u backport of 8208353. That's okay, as for 8u we will backport libpng from 11u or newer JDK releases, and not directly from the library.
> 
> Thanks!

The changes look good to me, although I'm not a reviewer.
But maybe it's better not to transfer .md syntax like ### and ``` into plain THIRD_PARTY_README files?

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PR Comment: https://git.openjdk.org/jdk8u-dev/pull/372#issuecomment-1721239913