File jython-sourcetarget.patch of Package jython

--- jython-svn-Release_2_2_1/build.xml	2007-10-13 20:44:01.000000000 +0200
+++ jython-svn-Release_2_2_1/build.xml	2017-09-08 11:01:08.947884132 +0200
@@ -174,8 +174,8 @@
         <property file="${basedir}/ant.properties" />
 
         <property name="build.compiler" value="modern" />
-        <property name="jdk.target.version" value="1.4" />
-        <property name="jdk.source.version" value="1.4" />
+        <property name="jdk.target.version" value="1.6" />
+        <property name="jdk.source.version" value="1.6" />
         <property name="deprecation" value="off" />
         <property name="debug" value="off" />
         <property name="optimize" value="on" />