[perl #39254] Unicode sub names don't work with :multi

[Will Coleda]

# New Ticket Created by Will Coleda
# Please include the string: [perl #39254]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org/rt3/Ticket/Display.html?id=39254 >

The recently added support (yay!) for subs with unicode names doesn't
work with :multi

.sub unicode:"\u7777" :multi(string)
.param pmc arg
print 'String:'
say arg
.end
.sub unicode:"\u7777" :multi(int)
.param pmc arg
print 'Int:'
say arg
.end

.sub main :main
unicode:"\u7777"('what')
unicode:"\u7777"(23)
.end