meson: src: build libvirt-lxc.so library

meson: src: build libvirt-lxc.so library

There are two extra dependencies compared to automake, apparmor and
selinux.  It looks like libtool is doing some magic and inheriting
dependencies from libvirt.la which inherits these dependencies from
other libraries.

Without these two dependencies in meson the compilation fails.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Neal Gompa <ngompa13@gmail.com>