Hi all, Please review a fix for https://bugs.openjdk.java.net/browse/JDK-8227124
This is subtask of JDK-8221512: Failed to complete jcmd operation '[error][attach] could not open pipe \\.\pipe\javatool-708501419 to send result of operation jcmd'
To fix issues with "could not open pipe" error, additional info is required, the change adds logging of system error.
webrev: http://cr.openjdk.java.net/~amenkov/jdk14/openPipeErrorLog/webrev/ --alex
