PDFBOX-5649: add license header

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1911995 13f79535-47bb-0310-9956-ffa450edef68

xmpbox/src/test/resources/org/apache/xmpbox/xml/PDFBOX-5649.xml

@@ -1,4 +1,22 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<!--
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ -->
 <?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>
 <x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 5.6-c145 79.163499, 2018/08/13-16:40:22        ">
    <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">