Double counting test broken on i686-linux

[IanButterworth]

Introduced by #54606 which fixed #53061

  | 2024-06-21 13:47:24 EDT | misc                                             (10) \|         failed at 2024-06-21T17:47:24.853
  | 2024-06-21 13:47:24 EDT | Test Failed at /cache/build/tester-amdci5-10/julialang/julia-buildkite/julia-01af3e921f/share/julia/test/misc.jl:590
  | 2024-06-21 13:47:25 EDT | Expression: abs(summarysize(z) - 640000) / 640000 <= 0.01
  | 2024-06-21 13:47:25 EDT | Evaluated: 0.18746875 <= 0.01
  | 2024-06-21 13:47:25 EDT

Test is marked as broken in #54896 so that i686-linux-gnu passes