[8u] Review request: RT-37012: [media] Native memory leaking until nio.Buffers are GC'ed

[anton nashatyrev]

Hello,

     could you please review the following fix:

Webrev: http://cr.openjdk.java.net/~anashaty/RT-37012/webrev.00/ 
<http://cr.openjdk.java.net/%7Eanashaty/RT-37012/webrev.00/>
Issue: https://javafx-jira.kenai.com/browse/RT-37012

Thank you!
Anton.