depmod: add sample to demonstrate the depmod, EXPORT_SYMBOL

This module explains the usage of EXPORT_SYMBOL. jayone.ko should
loaded before jaytwo.ko. If "depmod" used, then it will search for
dependency from /lib/modules/ and loads them.

Signed-off-by: Jeyaraman Rangasamy <jeyaraman.rangasamy@lge.com>