CCBC-492: Add `cbcrc` to API doc index

Change-Id: I89c9019425a3df7620962f22433bb5c167f6aaa9
Reviewed-on: http://review.couchbase.org/40190
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Brett Lawson <brett19@gmail.com>