Option to skip close TCP on IF down.

Option to skip close TCP on IF down.

This is VD specific requirement, not to close TCP
servers when interface down event is received.
New API "CAUtilSkipTCPCloseOnInterfaceDown" is
defined using which application can enable/disable
skip TCP server feature.

Signed-off-by: Harish Kumara M <h.marappa@samsung.com>
fix: save build error

https://github.sec.samsung.net/RS7-IOTIVITY/IoTivity/pull/388
(cherry picked from commit 725041caab8e0c1f14c6333cd066ea61a845893d)

Change-Id: Ifaf37379955d0d5615f08d43824148b6cbe075d3
Signed-off-by: Harish Kumara M <h.marappa@samsung.com>
Signed-off-by: Amit KS <amit.s12@samsung.com>