[perl6/specs] 84f5da: Swap IO::Path.child to use .child-secure's code

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs
  Commit: 84f5da58d69990eec7102c272657ca0e71783e84
      
https://github.com/perl6/specs/commit/84f5da58d69990eec7102c272657ca0e71783e84
  Author: Zoffix Znet <zoffixz...@users.noreply.github.com>
  Date:   2017-04-17 (Mon, 17 Apr 2017)

  Changed paths:
    M v6d.pod

  Log Message:
  -----------
  Swap IO::Path.child to use .child-secure's code