Enabled log4j in Felix Commons' parent POM to resolve FELIX-230 (Create an OSGi bundle for log4j).  Module now builds thanks to resolved FELIX-256 (Bundle-Version error).

git-svn-id: https://svn.apache.org/repos/asf/incubator/felix/trunk@518724 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/commons/pom.xml b/commons/pom.xml
index af82f48..56b7728 100644
--- a/commons/pom.xml
+++ b/commons/pom.xml
@@ -62,7 +62,7 @@
         <module>jstl</module>
         <!--<module>jta</module>-->
         <module>jzlib</module>
-        <!--<module>log4j</module>-->
+        <module>log4j</module>
         <module>logkit</module>
         <module>mail</module>
         <module>servlet-api</module>