libustcomm is an internal convience library used by both liblttng-ust
and liblttng-ust-ctl, move it to the common directory.
This is part of an effort to standardize our autotools setup across
projects to simplify maintenance.
Change-Id: I6ec03e5d4fb0f49dee4dc57ba16ee025dd1151a2
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>