Set the encoding (patch by Onkar Shinde <onkarshinde@ubuntu.com>)

Change-Id: I681da2f0e168cd8f806b0e08bd88db421c035400

Author: egonw

javadoc.xml

@@ -43,6 +43,7 @@
         <javadoc destdir="${javadoc.dir}"
                  author="true" version="true" use="true"
                  public="true"
+                 encoding="UTF-8"
                  windowtitle="CDK API - version ${TODAY_SVN}">
             <classpath>
                 <pathelement location="." />