[perl #126529] [JVM] Buf.pm infix:<~> bug; breaks IO::Socket

[Christian Bartolomaeus via RT]

This works now (again):

$ perl6-j -e 'my Blob $a = "a".encode; my Blob $b = "b".encode; $a ~= $b; say 
$a.perl'
utf8.new(97,98)

I added this evaluation as a test to S03-operators/buf.t. I'm closing this 
ticket as 'resolved'.