awk: Merge one true awk 20250804 bsd-feature branch
Merge in the latest one true awk to pick up two small bug fixes:
Aug 04, 2025
Fix incorrect divisor in rand() - it was returning
even random numbers only. Thanks to Ozan Yigit.
Fix a syntax issue with /= that caused constants to
turn into variables [eg. 42 /= 7]. Thanks to Arnold
Robbins.Note: vendor/one-true-awk/4d5b3604b34b_1 was the merge tag.
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