Fix build for Haiku

[Begasus]

No description provided.

[Begasus]

While checking latest stable and tagged release this was missing to include errno.h for Haiku.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.50%. Comparing base (df13338) to head (42ced40).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4069   +/-   ##
=======================================
  Coverage   85.50%   85.50%           
=======================================
  Files         237      237           
  Lines       57042    57042           
=======================================
  Hits        48771    48771           
  Misses       8271     8271           

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[Begasus]

Thanks! 👍

[masatake]

Thank you.