[15] RFR JDK-8087327: CipherStream produces new byte array on every update or doFinal operation

[Valerie Peng]

Hi,

Anyone can help review this straightforward enhancement? The changes are 
mostly based on the submitted patch with some minor polishing. 
Essentially re-using existing buffer instead of relying on the Cipher 
object to allocate new buffers.

RFE: https://bugs.openjdk.java.net/browse/JDK-8087327

Webrev: http://cr.openjdk.java.net/~valeriep/8087327/webrev.00/

Thanks,

Valerie