RFR: JDK-8295685: Update Libpng to 1.6.38 [v3]

Wed Nov 2 23:24:21 UTC 2022

On Wed, 2 Nov 2022 22:20:03 GMT, Alexander Zvegintsev <azvegint at openjdk.org> wrote:

>> Harshitha Onkar has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   updated instructions
>
> src/java.desktop/share/native/libsplashscreen/libpng/pngdebug.h line 1:
> 
>> 1: 
> 
> Not sure why this newline is needed.

Thanks for catching it. Updated.

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PR: https://git.openjdk.org/jdk/pull/10953