Copyright for libhinawa source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: libhinawa
Source: https://github.com/takaswie/libhinawa

Files: *
Copyright: 2015-2017 Takashi Sakamoto 
License: LGPL-2.1

Files: debian/*
Copyright:
 2015-2017 Takashi Sakamoto 
 2015 Yoshihiro Okada 
 2016-2018 Kentaro Hayashi 
License: LGPL-2.1

Files: src/backport.h
Copyright: 1991-2012 Linus Torvalds and many others
License: GPL-2

License: GPL-2
 On Debian systems, the complete text of the GNU General Public License version
 2 can be found in `/usr/share/common-licenses/GPL-2'.

License: LGPL-2.1
 On Debian GNU/Linux systems, the complete text of the LGPL 2.1
 license can be found in `/usr/share/common-licenses/LGPL-2.1'.