gtkvncviewer has been added since version 0.9.13 and
2650cfc17b,
disable it as it is only an example
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit c89f62cec6)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>