Set fname to symbol name. It now produces a valid binary, readable from freud-statistics.

src/main/java/Main.java

@@ -56,8 +56,8 @@ public class Main {
 
     private static void fillObject(TestClassToSerialize myObject) {
     // file name
-        myObject.setNameLen(15);
-        myObject.setFname("_Z9test_loopPii");
+        myObject.setNameLen(12);
+        myObject.setFname("_nicola_test");
     // feature names
         myObject.setFeatureNamesCount(0);
     // type names