Use RubyVM patched images

This switches GCK to use a patched Ruby version that is needed for: gitlab#296530 (closed).

marked this merge request as draft

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• f8d09d6b - 1 commit from branch master
• df5e6d8e - Use patched image
• 4733bb8e - Move depends early
• 9e77ad1a - Ensure that RUBY_VERSION is defined

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changed title from Draft: Use patched images to Use RubyVM patched images

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mentioned in issue gitlab#296530 (closed)

@mkaeppler WDYT? More context in here: gitlab#296530 (closed).

Works!

[4] pry(main)> Thread.current.memory_allocations
=> nil
[5] pry(main)> Thread.trace_memory_allocations = true
=> true
[6] pry(main)> s = "x" * 100_000
...
[7] pry(main)> Thread.current.memory_allocations
=> {:total_allocated_objects=>3679, :total_malloc_bytes=>1035360, :total_mallocs=>1098}
[8] pry(main)> Thread.trace_memory_allocations = false
=> false
[9] pry(main)> Thread.current.memory_allocations
=> nil

(not sure if the numbers add up, but it does count something)

@mkaeppler One info. The data are incremental, so you need to subtract before and after :)

assigned to @mkaeppler and unassigned @ayufan

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merged

@ayufan Thanks for this MR Why did you commit core file?

Mistake :P

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