Update cliopts (Was causing a crash in bench.cc)

Change-Id: I0f27bf3dd50b0218f19746f28e5f07ed7b260f81
Reviewed-on: http://review.couchbase.org/50157
Tested-by: buildbot <build@couchb

Update cliopts (Was causing a crash in bench.cc)

Change-Id: I0f27bf3dd50b0218f19746f28e5f07ed7b260f81
Reviewed-on: http://review.couchbase.org/50157
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Mark Nunberg <mark.nunberg@couchbase.com>

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Remove submodules

- Embed cliopts in contrib
- Add `SUBJSON_GTEST` cmake option. If specified and present, tests are
built. Otherwise they are not.