In multi_json 1.7.5 they are removing VERSION constant

Change-Id: I1bb97d3f85fa3fe5fde4e206cc5cc1e7faee164e
Reviewed-on: http://review.couchbase.org/26667
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>