Copyright for felix-resolver source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0
Upstream-Name: felix-framework
Source: https://archive.apache.org/dist/felix

Files: *
Copyright: 2013-2017, The Apache Software Foundation
           2006,2012, OSGi Alliance
License: Apache-2.0

Files: debian/*
Copyright: 2018, Kai-Chung Yan (殷啟聰) 
License: Apache-2.0


License: Apache-2.0
 On Debian systems, the complete text of the Apache License Version 2.0,
 can be found in /usr/share/common-licenses/Apache-2.0.