[perl #130953] [REGRESSION][REGEX] chars that look different in .fc break :i regex matches

[Zoffix Znet via RT]

Ooops. Never mind. That hang is due to RT#130940

As for this ticket, I've added fudged tests to cover it now: 
https://github.com/perl6/roast/commit/2fa32e11eb

Please note, this ticket is now marked as a release blocker, with the release 
scheduled to occur on March 18, 2017.