RFR: JDK-8136577: Make AbortVMOnException available in product builds

[Poonam Bajaj Parhar]

Hello,

Please review the code changes for the following change request:

Bug: JDK-8136577: Make AbortVMOnException available in product builds

Fix: These changes make the JVM options AbortVMOnException and 
AbortVMOnExceptionMessage available in product builds by changing them 
from 'debug' to 'diagnostic' options. Having these in product builds 
would be very useful to capture diagnostic data when an application 
fails with exceptions. This would be very useful in troubleshooting 
issues where only an exception is thrown.

Webrev: http://cr.openjdk.java.net/~poonam/8136577/webrev.00/

Tests: Ran a simple testcase that throws exception and confirmed that it 
generates hs_err and core file when the specified exception occurs.

regards,
Poonam