RFR(XS): 8205719: Windows Java_sun_tools_attach_VirtualMachineImpl_enqueue() method should include exitCode in exception message

[Chris Plummer]

Hello,

Please review the following:

https://bugs.openjdk.java.net/browse/JDK-8205719
http://cr.openjdk.java.net/~cjplummer/8205719/webrev.00/

I am adding some debugging code to help track down the root cause of 
JDK-8199811.

thanks,

Chris