Set RTC_WATCHDOG flag to disable RTC checks

:Release Notes:
Set RTC_WATCHDOG flag to disable RTC checks

:Detailed Notes:
In the absence of this variable, the WITHOUT_RTC_WATCHDOG flag is not
defined which leads to calling of the function _rtc_check, and since
/dev/rtc device is not present , the function always fails. So setting
RTC_WATCHDOG to FALSE fixes this issue.

:Testing Performed:
Watched sleepd logs for some time with this change and did not see the
following logs:
user.warning sleepd [] sleepd RTC_ERR {"NYX_QUERY_TIME":0,"RTC_TIME":1}
RTC appears not to be ticking,showing same RTC time

:Issues Addressed:
[GF-46168] Sleepd is logging RTC time error

Open-webOS-DCO-1.0-Signed-off-by: Sapna Todwal <sapna.todwal@lge.com>

Change-Id: I3ed006f99fdefcf5641309675ca69de970888048
Reviewed-on: https://g2g.palm.com/4125
Reviewed-by: DCO Verification
Tested-by: Sapna Todwal <sapna.todwal@lge.com>
Reviewed-by: Keith Derrick <keith.derrick@lge.com>