Do not close fd of AUL connection

Do not close fd of AUL connection

After this patch is applied, AMD doesn't close the file descriptor of
the AUL connection. When the connection is disconnected, AMD notifies
that the process is terminated. In this time, AMD handles the
application termination if the process is the application.

Requires:
 - https://review.tizen.org/gerrit/#/c/platform/core/appfw/aul-1/+/265335/
 - https://review.tizen.org/gerrit/#/c/platform/core/appfw/amd/+/265818/
 - https://review.tizen.org/gerrit/#/c/platform/core/appfw/launchpad/+/265825/

Change-Id: I03feebb44dc19fb85fd67d9898c289a5a52f6cce
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>