Cross build aarch64

[andrewdavidmackenzie]

Fixes #440
Fixes #392

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 29%. Comparing base (c1c4cf4) to head (d885da7).
Report is 20 commits behind head on master.

Additional details and impacted files

@@          Coverage Diff          @@
##           master   #448   +/-   ##
=====================================
  Coverage      29%    29%           
=====================================
  Files          40     40           
  Lines        4899   4899           
=====================================
  Hits         1401   1401           
  Misses       3498   3498           

Flag	Coverage Δ
unittests	29% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.