Fixes and testing changes

line 11: Uncommenting return code for exit
line 13: Editing return value for echo to test exit

examples/echo.c

@@ -10,5 +10,5 @@ main (int argc, char **argv)
     printf ("%s ", argv[i]);
   printf ("\n");
 
-  return EXIT_SUCCESS;
+  return 5;
 }