Request for review 7188233: Deprecate the UseVMInterruptibleIO flag for JDK8

[harold seigel]

Summary:  The -XX:+UseVMInterruptibleIO flag is deprecated for JDK8.  
The flag will still enable Interruptible IO on Solaris, but users will 
get a warning.

This is a revised request.  Comments were added to the code and the 
deprecate message was slightly enhanced.

Open webrev at http://cr.openjdk.java.net/~coleenp/Bug7188233 
<http://cr.openjdk.java.net/%7Ecoleenp/Bug7188233>

Bug link at http://bugs.sun.com/view_bug.do?bug_id=7188233

Tested with JCK, JPRT, and tests on Solaris that behave differently 
depending on the setting of the UseVMInterruptibleIO flag.

Thanks, Harold