8202284: FileChannel and FileOutpuStream variants of AtomicAppend should pass silently on macOS >= 10.13

[Chris Hegarty]

> On 25 Apr 2018, at 23:11, Brian Burkhalter <Brian.Burkhalter at oracle.com> wrote:
> 
> Issue:	https://bugs.openjdk.java.net/browse/JDK-8202284
> Patch:	http://cr.openjdk.java.net/~bpb/8202284/webrev.00/

I think this looks good Brian.

> On 26 Apr 2018, at 01:09, Brian Burkhalter <Brian.Burkhalter at oracle.com> wrote:
> 
> https://bugs.openjdk.java.net/browse/JDK-8202290 to track this problem.

I agree with filing a new issue to track the underlying bug,
rather than attempting to re-open an already resolved one.

-Chris.