RFR: 8080803: sun/nio/cs/FindEncoderBugs.java failing intermittently

[Xueming Shen]

Martin, Alan, Joe,

Would you please help review the change (as a workaround) for this 
"intermittently" problem?

https://bugs.openjdk.java.net/browse/JDK-8080803
http://cr.openjdk.java.net/~sherman/8080803

It appears the trigger might be that ByteBuffer.get(byte[]) fails to get 
the bytes from the buffer "intermittently".
Interestingly this one is always reproducible on my local linux build 
(very old os), in which I have to update
couple hotspot headfile to make the build going recently. I filed the 
bug#8080904 to let the vm guy take a look.

Meanwhile the proposed change here is just to "optimized" the ISO2022 
code a little to simple workaround
this issue. I hope this can make the "intermittent failure" go away in 
our nightly build. If have time, we definitely
should re-visit the implementation of these ISO2022 :-)

Thanks,
-Sherman