apt: Move sources into sources.list to make other packages happy

This resolves (partly) an issue with python-apt where it's complaining about a
missing /etc/apt/sources.list file.

Change-Id: Iecb8bd318e10551490369855acc89c4530ef4f08
(cherry picked from commit df3e541400f3bd1340403631e68d44f8e41478ba)
1 file changed
tree: 684730f9628d78ffd63b78e8f18d626e91b39be5
  1. debian/
  2. etc/
  3. usr/