Debian package - copyright file.
Debian package - copyright file.

This updates the debian/copyright file to mention files from Chromium
and other authors.

Author: daniel@pocock.pro

R=jia.shao.peng@gmail.com
BUG=

Review URL: https://codereview.appspot.com/131960043
nyaruka/libphonenumber,nyaruka/libphonenumber,nyaruka/libphonenumber,nyaruka/libphonenumber