tests: Don't rely on non-portable paths
tests: Don't rely on non-portable paths

The test-events program sets up a watch on /bin/true; however,
that path is not portable: FreeBSD uses /usr/bin/true for example.

Remove the portability issue by using /dev/null instead.

Signed-off-by: Andrea Bolognani <3ada0bee826c753786fdbba72243dfba997094cf@redhat.com>
Reviewed-by: Daniel P. Berrange <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

libvirt/libvirt-glib,libvirt/libvirt-glib,libvirt/libvirt-glib