Closes: #974749

As requested by himself

Update to upstream version '4.4.13'
with Debian dir c95b988fcb7906e5db2553735adca405a107b8cb

Update to upstream version '4.4.0'
with Debian dir d88f407dcb9bd8bcaaf91eb8352172d11c9d9c4e

Update to upstream version '4.3.1'
with Debian dir 884ba29ddafde48a7c3c6f10b1ccb9e672e8c1dd

Update to upstream version '4.3.0'
with Debian dir c53308290b04aa03f8de7af2c2b098ae182510a8

Since bctoolbox is the only Debian packaging repo of the whole linphone
stack that is using the upstream git repo directly, switch to importing
upstream tarballs to make it consistent.

Together with "git branch upstream 0.6.0" this should do the trick.

Thanks: James Cowgill <jcowgill@debian.org>
Closes: #890417

0.6.0