upgraded truffle dependency

mx.fastr/suite.py

@@ -29,7 +29,7 @@ suite = {
             {
                "name" : "truffle",
                "subdir" : True,
-               "version" : "acbe9ec935090e0824372e508563c122b0e46682",
+               "version" : "538d97d5e696be8a0f882cf970e70689674651c2",
                "urls" : [
                     {"url" : "https://github.com/graalvm/graal", "kind" : "git"},
                     {"url" : "https://curio.ssw.jku.at/nexus/content/repositories/snapshots", "kind" : "binary"},