[crac] RFR: Fix builds

[Anton Kozlov]

On Sun, 13 Aug 2023 12:22:04 GMT, Jan Kratochvil <jkratochvil at openjdk.org> wrote:

>> Fix builds in vairous configurations
>
> src/hotspot/cpu/s390/vm_version_s390.hpp line 571:
> 
>> 569: 
>> 570:   // No _features_names[] available on this CPU.
>> 571:   static void insert_features_names(char* buf, size_t buflen, unsigned long features[] = _features) {}
> 
> I do not see a reason for this change. How to test the s390 build?

>From the line 123 from this file --  _features is 

  static unsigned long _features[_features_buffer_len];


The build is tested in GHA https://github.com/AntonKozlov/crac/actions/runs/5841005695/job/15841780175

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PR Review Comment: https://git.openjdk.org/crac/pull/104#discussion_r1293408702