Fixing JIRA Issue #1651: https://issues.apache.org/jira/browse/XERCESJ-1651. \w should be processed as [#x0000-#x10FFFF]-[\p{P}\p{Z}\p{C}] as per the XML Schema specification.

git-svn-id: https://svn.apache.org/repos/asf/xerces/java/trunk@1638344 13f79535-47bb-0310-9956-ffa450edef68