Add packaging in clone method.

There are some other fields that don't have cloned

git-svn-id: https://svn.apache.org/repos/asf/maven/components/trunk@279308 13f79535-47bb-0310-9956-ffa450edef68

maven-project/src/main/java/org/apache/maven/project/ModelUtils.java

@@ -466,6 +466,7 @@ public final class ModelUtils
         newModel.setVersion( model.getVersion() );
         newModel.setArtifactId( model.getArtifactId() );
         newModel.setGroupId( model.getGroupId() );
+        newModel.setPackaging( model.getPackaging() );
         newModel.setModules( cloneModules( model.getModules() ) );
         assembler.copyModel( newModel, model );
         return newModel;