Suppress JFFI sun.misc.Unsafe warnings in ExifTool example

Author: fglock

examples/ExifToolExample.java

@@ -29,7 +29,7 @@
  *   2. Compile this example:
  *        javac -cp target/perlonjava-3.0.0.jar examples/ExifToolExample.java
  *   3. Run:
- *        java -cp target/perlonjava-3.0.0.jar:. examples.ExifToolExample
+ *        java --sun-misc-unsafe-memory-access=allow -cp target/perlonjava-3.0.0.jar:. examples.ExifToolExample
  */
 public class ExifToolExample {