RFR 8202675 : Replace process-wide terminology in serial filtering to be consistent

[Roger Riggs]

Please review a doc-only change to serial filter descriptions to use the 
term
"system-wide" to describe the scope of configurable filters.

Webrev:
   http://cr.openjdk.java.net/~rriggs/webrev-system-wide-8202675/

CSR:
   https://bugs.openjdk.java.net/browse/JDK-8216289

Thanks, Roger