SSL Build fixups

- Fix noop definition of lcbio_ssl_new() [ was modified for the CCBC-475
  commit]
- Declare lcbio_ssl_check and lcbio_ssl_get_error to be exported via
  LCB_INTERNAL_API. This is needed as these functions are now used in
  ctx.c which is itself tested from within sock-tests

Change-Id: I34fbc58fdf319df77149b1824b2b9b624407c5ad
Reviewed-on: http://review.couchbase.org/39551
Reviewed-by: Brett Lawson <brett19@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>