lttng-babeltrace: bump to version 1.4.0

Current patches are dropped because they were merged upstream.

Official upstream site of Babeltrace for the distribution of tarballs
changed from lttng.org to efficios.com (see
<http://diamon.org/babeltrace>).

Official Babeltrace's website changed from
<http://www.efficios.com/babeltrace> to <http://diamon.org/babeltrace

>.

I explicitly disable the support for debug informations in this patch to
add it in a separate patch.

Signed-off-by: Philippe Proulx <eeppeliteloop@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>