Review request for 6824135

[Alan Bateman]

6824135: (ch) test/java/nio/channels/AsyncCloseAndInterrupt.java fails (lnx)

test/java/nio/channels/AsyncCloseAndInterrupt.java has been failing 
since b50. The failure is a hang that arises when FileChannel methods 
are invoked with a pending interrupt. The pending interrupt causes the 
channel to be pre-closed and a wait until all other threads are finished 
with the file descriptor. I broke this in b50 with the nio2 bits so that 
the current thread is added to the thread list before the begin method, 
which marks the beginning of an I/O operation, is invoked. The test 
caught the bug but I'm surprised that I didn't spot the failure before 
pushing the changes. In any case, the fix is simple:
  http://cr.openjdk.java.net/~alanb/6824135/webrev.00/

(Sherman, if you cycles, I'd like to get this one into b54).

Thanks,
Alan.