zdtm.py: create "dev/autofs" root contruction

Required for test/zdtm/static/autofs test.
Signed-off-by: Stanislav Kinsburskiy <skinsbursky@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/zdtm.py

@@ -196,6 +196,7 @@ class ns_flavor:
 		self.__mknod("null", os.makedev(1, 3))
 		self.__mknod("net/tun")
 		self.__mknod("rtc")
+		self.__mknod("autofs", os.makedev(10, 235));
 
 	def __copy_deps(self, deps):
 		for d in deps.split('|'):