examples: fix dependencies
Without this, I am getting:
../examples/gvncviewer.c:34:10: fatal error: gio/gunixsocketaddress.h: No such file or directory
#include <gio/gunixsocketaddress.h>
^~~~~~~~~~~~~~~~~~~~~~~~~~
Without this, I am getting:
../examples/gvncviewer.c:34:10: fatal error: gio/gunixsocketaddress.h: No such file or directory
#include <gio/gunixsocketaddress.h>
^~~~~~~~~~~~~~~~~~~~~~~~~~