cptbox: automatically generate FreeBSD syscalls

[quantum5]

No description provided.

[codecov-commenter]

Codecov Report

Merging #976 (ac75ae8) into master (79692ed) will increase coverage by 3.11%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #976      +/-   ##
==========================================
+ Coverage   80.63%   83.74%   +3.11%     
==========================================
  Files         138      138              
  Lines        4694     4694              
==========================================
+ Hits         3785     3931     +146     
+ Misses        909      763     -146     

Impacted Files	Coverage Δ
dmoj/cptbox/isolate.py	86.55% <ø> (+49.57%)	⬆️
dmoj/judge.py	52.83% <0.00%> (+1.25%)	⬆️
dmoj/executors/java_executor.py	85.35% <0.00%> (+2.02%)	⬆️
dmoj/executors/compiled_executor.py	77.71% <0.00%> (+4.57%)	⬆️
dmoj/utils/communicate.py	93.42% <0.00%> (+5.26%)	⬆️
dmoj/cptbox/tracer.py	77.33% <0.00%> (+18.34%)	⬆️
dmoj/cptbox/handlers.py	100.00% <0.00%> (+25.00%)	⬆️
dmoj/control.py	100.00% <0.00%> (+64.70%)	⬆️

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