RFR:8064319:Enable -XX:+TraceExceptions in product builds.

[Max Ockner]

Hello all,
Please review my small fix for the TraceExceptions command line argument.

Bug:   https://bugs.openjdk.java.net/browse/JDK-8064319
Webrev:   http://cr.openjdk.java.net/~coleenp/8064319/
Summary:    -XX:+TraceExceptions was previously enabled only in 
development/debug versions, and not in product builds. Now it is enabled 
in product builds as well.
Tested with JPRT and updated TraceExceptions.java test.

Thanks,
Max Ockner