[DRE-maint] Bug#1034565: ftbfs tests fail on ppc64el and mips64el

[Pirate Praveen]

Package: ruby-prometheus-client-mmap
Version: 0.17.0+spec-1
Severity: serious
Control: forwarded -1 
https://gitlab.com/gitlab-org/ruby/gems/prometheus-client-mmap/-/issues/43

Version in testing is not affected as we did not have tests enabled.

Failures:

   1) Prometheus::Client::Helper::MmapedFile file does not exist creates 
a file with minimum initial size
      Failure/Error: expect(File.size(subject.filepath)).to 
eq(subject.send(:initial_mmap_file_size))

        expected: 4096
             got: 16384

        (compared using ==)
      # ./spec/prometheus/client/helpers/mmaped_file_spec.rb:30:in 
`block (3 levels) in <top (required)>'

   2) Prometheus::Client::MmapedDict#initialize empty mmap'ed file is 
initialized with correct size
      Failure/Error: expect(File.size(tmp_file.path)).to 
eq(tmp_mmaped_file.send(:initial_mmap_file_size))

        expected: 4096
             got: 16384

        (compared using ==)
      # ./spec/prometheus/client/mmaped_dict_spec.rb:19:in `block (4 
levels) in <top (required)>'

   3) Prometheus::Client::MmapedDict#initialize mmap'ed file that is 
above minimum size is initialized with the a page size
      Failure/Error: expect(tmp_file.size).to eq(4096);

        expected: 4096
             got: 16384

        (compared using ==)
      # ./spec/prometheus/client/mmaped_dict_spec.rb:34:in `block (4 
levels) in <top (required)>'

Full build logs 
https://buildd.debian.org/status/fetch.php?pkg=ruby-prometheus-client-mmap&arch=ppc64el&ver=0.19.1-1&stamp=1681745611&raw=0 
https://buildd.debian.org/status/fetch.php?pkg=ruby-prometheus-client-mmap&arch=mips64el&ver=0.19.1-1&stamp=1681745649&raw=0

Forwarded upstream at 
https://gitlab.com/gitlab-org/ruby/gems/prometheus-client-mmap/-/issues/43
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