Added Arduino Mega w/WiFi build to auto build process.

Added Arduino Mega w/WiFi build to auto build process.

Seung-Woo Lee found a problem with the build for Arduino Mega w/WiFi.
As a result, I am adding this to the build machine list to prevent
regression in the future.

Change-Id: Icdc9fd0ffd911c1bc9c1878f17ebb86010f2c2e1
Signed-off-by: Patrick Lankswert <patrick.lankswert@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/359
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Joseph Morrow <joseph.l.morrow@intel.com>
Reviewed-by: Sudarshan Prasad <sudarshan.prasad@intel.com>