RFR: JDK-8348598 : Update Libpng to 1.6.47 [v3]

[Harshitha Onkar]

On Thu, 13 Mar 2025 19:52:12 GMT, Phil Race <prr at openjdk.org> wrote:

>> Harshitha Onkar has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   header update
>
> I was surprised by how many changes there are.

@prrace 
> I was surprised by how many changes there are.

Yes, it was definitively more compared to last update.

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PR Comment: https://git.openjdk.org/jdk/pull/24021#issuecomment-2730214678