CAPI module got renamed

As the current spatial views are broken anyway, the new module can just
replace the old one without a different name. Hence `capi_spatial` can
be used for that module.

Change-Id: I76a1971d3abf54c8af8e025d78fdffd609100d0b
Reviewed-on: http://review.couchbase.org/40133
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Tested-by: Volker Mische <volker.mische@gmail.com>