Copyright for carrotsearch-hppc source package in Bionic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: High Performance Primitive Collections for Java
Source: http://labs.carrotsearch.com/hppc.html

Files: *
Copyright: 2014, Carrot Search s.c.
License: Apache-2.0

Files: debian/*
Copyright: 2014, Hilko Bengen 
License: Apache-2.0

License: Apache-2.0
 On Debian systems, the full text of the Apache-2.0 license
 can be found in the file '/usr/share/common-licenses/Apache-2.0'