cad/magic: update 8.3.522 → 8.3.526

Revision History:
http://opencircuitdesign.com/magic/history.html#History8_3

Commit log:
https://github.com/RTimothyEdwards/magic/compare/8.3.522...8.3.526

Pet portclippy.

PR: 286098
Approved by: yuri (maintainer, timeout > 2 weeks)