CBLT-202:  use abs.path to android zip to avoid confusion

Change-Id: Id6723590cc07fb54c908178a9d594d97a611b6b4
Reviewed-on: http://review.couchbase.org/34687
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>