Fix: Update lttng-modules load list

Fix: Update lttng-modules load list

Observed issue
==============

When starting a root sessiond, after stopping it there would still be
lttng-modules modules loaded in the kernel.

```
$ lsmod | grep lttng || echo "nothing"
nothing

$ lttng-sessiond -b

$ killall lttng-sessiond

$ lsmod | grep lttng || echo "nothing"
lttng_statedump       757760  0
lttng_wrapper          16384  1 lttng_statedump
lttng_uprobes          12288  0
lttng_clock            12288  0
lttng_kprobes          12288  0
lttng_lib_ring_buffer    90112  0
lttng_kretprobes       12288  0
```

Cause
=====

Not all modules are listed in the core/data modules in `modprobe.cpp`.

Solution
========

Add missing modules.

Known drawbacks
===============

None.

Change-Id: I28525c55eadb95467f77ffac0b9152ac8576e0fc
Signed-off-by: Kienan Stewart <kstewart@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>