Change the license of debian files to Apache-2.0 because

this makes it easier for upstream to incorporate patches.

debian/changelog

@@ -18,6 +18,8 @@ libmetadata-extractor-java (2.10.1-1) experimental; urgency=medium
       <additionalparam>--allow-script-in-comments</additionalparam>
     However the Google Analytics code is also a privacy issue hence I prefer to
     remove it.
+  * Use the Apache-2.0 license for debian/* files because that makes it easier
+    for upstream to incorporate patches.
 
  -- Markus Koschany <apo@debian.org>  Fri, 30 Jun 2017 23:08:53 +0200
 

debian/copyright

@@ -6,14 +6,14 @@ Source: https://github.com/drewnoakes/metadata-extractor
 Files: *
 Copyright: 2002-2017, Drew Noakes
 License: Apache-2.0
- On Debian systems you can find the complete text of the
- Apache-2.0 license in '/usr/share/common-licenses/Apache-2.0'
 
 Files: debian/*
 Copyright: 2007, Andreas Putzo <andreas@putzo.net>
            2010, Torsten Werner <twerner@debian.org>
            2013, Emmanuel Bourg <ebourg@apache.org>
            2017, Markus Koschany <apo@debian.org>
-License: GPL-2
+License: Apache-2.0
+
+License: Apache-2.0
  On Debian systems you can find the complete text of the
- GPL-2 license in '/usr/share/common-licenses/GPL-2'
+ Apache-2.0 license in '/usr/share/common-licenses/Apache-2.0'