RFR 8037274 (Round 0): sun.tools.attach.WindowsVirtualMachine#createPipe() needs more descriptive message when pipe creation fails

[Jaroslav Bachorik]

Please, take a look at this patch.

Issue : https://bugs.openjdk.java.net/browse/JDK-8037274
Webrev: http://cr.openjdk.java.net/~jbachorik/8037274/webrev.00/

This patch adds an additional info to the error message issued when an 
attempt to create a named pipe fails. This is supposed to help when 
identifying the failure cause. The fix is pretty simple but the code I 
produced might not be exactly aligned with the general C coding style in 
JDK source base. If you see any violation, please, let me know.

Thanks!

-JB-