RFR: JDK-8309224: Fix xlc17 clang 15 warnings in java.desktop [v2]

[Goetz Lindenmaier]

On Thu, 1 Jun 2023 17:13:56 GMT, Phil Race <prr at openjdk.org> wrote:

>> JoKern65 has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update Awt2dLibraries.gmk
>>   
>>   followed prrace annotation
>
> make/modules/java.desktop/lib/Awt2dLibraries.gmk line 708:
> 
>> 706:   # The external libpng submitted in the jdk is an old version
>> 707:   # which does not contain .png_init_filter_functions_vsx.
>> 708:   # Therefore we need to disable PNG_POWERPC_VSX_OPT explicitely by setting
> 
> explicitely -> explicitly
> 
> And it isn't an old version. It is very current.
> I think we just chose not to import functionality we weren't using.

Was fixed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/14263#discussion_r1214029889