Fixing crash in ocrandom.c (#516)

Fixing crash in ocrandom.c (#516)

* Fixing crash in ocrandom.c

-In function OCFillRandomMem() in ocrandom.c, location array was filled by incrementing the pointer. As a result,
the base pointer was pointing out the last byte of memory chunk instead of pointing the beginning of the array.

Signed-off-by: Samanway Dey <samanway.dey@samsung.com>
* Update ocrandom.c

Iterating till i > 1 for random swaps.

https://github.sec.samsung.net/RS7-IOTIVITY/IoTivity/pull/516
(cherry picked from 643d922896dfeaf5f3d829009bd1d5b09654d93b)

Change-Id: I8031d4cf5cc22c682ff5c0df607c78e276923bcf
Signed-off-by: DoHyun Pyun <dh79.pyun@samsung.com>