Since for our deb packages all the binary packages share the same
source package, and are built in the same environment, depending on
the distro and dpkg tools versions, dpkg-shlibdeps might incorrectly
add the wrong libclient package for either clients.  For example,
have the jami-gnome package depend on both jami-libclient-gnome and
jami-libclient; which is wrong, since jami-libclient-gnome and
jami-libclient conflict with each other and cannot be installed
simultaneously.  So, we instruct dpkg-shlibdeps to exclude the two
libclient packages from ${shlibs:Depends}, which is fine because
we already manually add the correct one to each client's Depends.

Also, use the system libarchive-dev package for Ubuntu 18.04 as well;
since like with Debian 10, building libarchive from daemon's contribs
fails there too.

GitLab: #1415
Change-Id: I1c065a7fd3fc58324c7893d5d23039f2a5109931