Make encode/decode test pass on rakudo for now

Author: lizmat

S02-names-vars/perl.t

@@ -189,12 +189,11 @@ my @tests = (
 }
 
 # Buf
-#?rakudo skip 'expected Bug but got utf8'
 #?niecza skip 'Unhandled exception'
 #?pugs skip "doesn't have encode()"
 {
-    my Buf $a = "asdf".encode();
-    is eval($a.perl).decode("ascii"), "asdf";
+    my Blob $a = "asdf".encode();
+    is eval($a.perl).decode("utf8"), "asdf";
 }
 
 done;