CBLT-344:  quit after unit tests if build_cblite_android.sh gets optional 5th parameter

Change-Id: I074972e90062fec945059cba9b931a57e923f0d2
Reviewed-on: http://review.couchbase.org/41458
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>