MB-11202: Add OpenSSL libs to users of libcurl

Moxi uses libcurl; which is now being built with OpenSSL
support. Therefore also link in OpenSSL libraries.

Change-Id: I3041566aaf715a207bb71f75253d4d11d4ee6eed
Reviewed-on: http://review.couchbase.org/37654
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Chris Hillery <ceej@couchbase.com>