FELIX-442: improve error message

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@610410 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/bundleplugin/src/main/java/org/apache/felix/bundleplugin/BundlePlugin.java b/bundleplugin/src/main/java/org/apache/felix/bundleplugin/BundlePlugin.java
index 14fb93a..56f139c 100644
--- a/bundleplugin/src/main/java/org/apache/felix/bundleplugin/BundlePlugin.java
+++ b/bundleplugin/src/main/java/org/apache/felix/bundleplugin/BundlePlugin.java
@@ -342,7 +342,7 @@
             }
             catch (Exception e)
             {
-                getLog().warn( "Unable to merge Maven manifest" );
+                getLog().warn( "Unable to merge Maven manifest: " + e.getLocalizedMessage() );
             }
             
             jarFile.getParentFile().mkdirs();