Changed the systemid to have a valid one with file:/// rather than file:.

Some xalan code are doing some check on file:, file:/, file://, file:///, file:///
But I'd rather take file:/// which is normally the valid one.
Reported by Michael J. Hudson <mhudson@blueprinttech.com>


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269513 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/optional/TraXLiaison.java

@@ -104,7 +104,7 @@ public class TraXLiaison implements XSLTLiaison {
 
     protected String normalize(String fileName) {
         if(fileName != null && !fileName.startsWith(FILEURL)) {
-            return FILEURL + fileName;
+            return FILEURL + "///" + fileName;
         }
         return fileName;
     }