(CBD-1191) Update ep-unit-tests script to fix unit test due to Cmake change.

Change-Id: I40a7ef142dbbdb6a4d3110eafd8b98101c81c8ef
Reviewed-on: http://review.couchbase.org/33498
Reviewed-by: Philip Labee <philip@couchbase.com>
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Reviewed-by: Eric Limare <eric.limare@couchbase.com>
Tested-by: Eric Limare <eric.limare@couchbase.com>