Update maven-javadoc-plugin to 2.4 because 2.3 had trouble with IBM JDK


git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@667256 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom/pom.xml b/pom/pom.xml
index f52ed93..15dc4ea 100644
--- a/pom/pom.xml
+++ b/pom/pom.xml
@@ -315,7 +315,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-javadoc-plugin</artifactId>
-          <version>2.3</version>
+          <version>2.4</version>
         </plugin>
 <!--     <plugin>
           <groupId>org.apache.felix</groupId>