RFR 8037274 : sun.tools.attach.WindowsVirtualMachine#createPipe() needs more descriptive message when pipe creation fails

[Jaroslav Bachorik]

Thanks for the Round-0 comments!


Please, take a look at the updated patch.

Issue : https://bugs.openjdk.java.net/browse/JDK-8037274
Webrev: http://cr.openjdk.java.net/~jbachorik/8037274/webrev.02/

The change is about adding the the last error code number to the default 
provided failure message if FormatMessage() is not able recognize the 
error code for whatever reason.

Thanks!

-JB-