Use argos_watchdog

Use argos_watchdog

argos watchdog is watchdog lib which has systemd backend
on platform and backend can be reimplemented by product developer

argos watchdog provides per-process watchdog registration
(systemd allows per-thread but it's not guaranteed by other
backends for now)

This feature is on discussion with multiple product divisions
so it would be easily enabled/disabled by build feature
in compile time

Change-Id: Idb28caa52f3d20a2e0030c84852ad101fdbb6623
Signed-off-by: Kyungwook Tak <k.tak@samsung.com>