RFR: JDK-8245660: Try to recover from "Windbg Error: WaitForEvent failed" error

[Alex Menkov]

Hi all,

Please review the fix for
https://bugs.openjdk.java.net/browse/JDK-8245660
webrev:
http://cr.openjdk.java.net/~amenkov/jdk15/windbg_waitForEvent_try/webrev/

This is temporary change to try different approaches to fix
https://bugs.openjdk.java.net/browse/JDK-8204994 (SA might fail to 
attach to process with "Windbg Error: WaitForEvent failed")

--alex