Update import.

mx.fastr/suite.py

@@ -7,7 +7,7 @@ suite = {
             {
                "name" : "truffle",
                "subdir" : True,
-               "version" : "7346c26ac0201989efff0a597397b3c5b52ae150",
+               "version" : "1920ecf956d16175b95c0e301d290bc0a8e2c995",
                "urls" : [
                     {"url" : "https://github.com/graalvm/graal", "kind" : "git"},
                     {"url" : "https://curio.ssw.jku.at/nexus/content/repositories/snapshots", "kind" : "binary"},