CBLT-252:  also use: git submodule init

Change-Id: I5ee8403a3f8cd22d05e408c78fb9656230ae4a6c
Reviewed-on: http://review.couchbase.org/35125
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>