internal/cabi: support arch 386

[visualfc]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 97.95918% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.15%. Comparing base (04bb3eb) to head (fd0b2ff).
⚠️ Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/cabi/arch.go	96.59%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1220      +/-   ##
==========================================
+ Coverage   87.99%   88.15%   +0.15%     
==========================================
  Files          34       34              
  Lines        8358     8470     +112     
==========================================
+ Hits         7355     7467     +112     
  Misses        934      934              
  Partials       69       69              

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