Correct a .ord test, unfudge on rakudo.moar.

We've decided that we won't leak synthetic codepoints out, since it'll
prevent us from ever doing any scheme other than process-global if any
code in the wild comes to rely on them comparing accross strings.

S15-string-types/Str.t

@@ -13,5 +13,5 @@ is qq:nfg/ẛ̣/.WHAT, Str, ":nfg adverb on quoteforms results in Str.";
 is "ẛ̣".chars, 1,  "Str.chars returns number of graphemes.";
 #?rakudo 1 skip 'Str.graphs NYI'
 is "ẛ̣".graphs, 1, "Str.graphs returns number of graphemes.";
-#?rakudo todo "NYI"
-ok "ẛ̣".ord < 0, "Str.ord returns negative number for NFG grapheme.";
+#?rakudo.jvm todo "NFG on JVM"
+is "ẛ̣".ord, 0x1E9B, "Str.ord returns first NFC codepoint for NFG grapheme";