Add missing opening plugins tag

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@920338 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/karaf/assembly/pom.xml b/karaf/assembly/pom.xml
index c4f30a2..a5c6e91 100644
--- a/karaf/assembly/pom.xml
+++ b/karaf/assembly/pom.xml
@@ -307,6 +307,7 @@
                 </includes>
             </resource>
         </resources>
+        <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-resources-plugin</artifactId>