bindings: close after reading module struct
bindings: close after reading module struct

Do not let the module struct to be deallocated by `uv_dlclose`
before reading data from it.

PR-URL: https://github.com/nodejs/node/pull/2792
Reviewed-By: Ben Noordhuis <59bd0a3ff43b32849b319e645d4798d8a5d1e889@bnoordhuis.nl>
Reviewed-By: Brian White <d8bbf19083844493ef08581d1c38fbc50ba5d18b@mscdex.net>
Reviewed-By: Yosuke Furukawa <a4a97d5c772a4709dd11cd938982cfc3cec0c86f@gmail.com>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node