Made changes required to get the RI layer to build properly for Arduino.

Made changes required to get the RI layer to build properly for Arduino.

Changes made in the RI Code Review(49ead758a03c532e7c95f5b6eb88c1d979cd36a0)
introduced build warnings on Linux. Due to the use of an older and more
verbose compiler when building for Arduino, these warnings are errors in the
build process for Arduino. This commit enables Arduino compilation by fixing
those errors.

Change-Id: I36643b4769a65badad5fc69b6fc18dbce18e22fa
Signed-off-by: Joseph Morrow <joseph.l.morrow@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/515
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Erich Keane <erich.keane@intel.com>