RFR: 8204541: Correctly support AIX xlC 16.1 symbol visibility flags [v2]

[Thomas Stuefe]

On Fri, 18 Mar 2022 08:03:11 GMT, Ichiroh Takiguchi <itakiguchi at openjdk.org> wrote:

>> This change is just for AIX platform with IBM XL C/C++ 16.1.
>> By this change, lib's entry points are reduced by compilation and linkage option changes.
>> 
>> Without changes:
>> 
>> $ dump -X32_64 -Tv lib/libawt.so | grep EXP | wc
>> 914
>> 
>> With changes
>> 
>> $ dump -X32_64 -Tv lib/libawt.so | grep EXP | wc
>> 142
>
> Ichiroh Takiguchi has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove unexpected comment

Looks good.

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Marked as reviewed by stuefe (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/7862