node: add use-shared-libraries option and remove openssl dependency

Node compiles v8, openssl and zlib on every update. Using shared v8
(and openssl/zlib) cuts compilation time from 5.6 minutes to 58 second.

openssl dependency was added with mxcl/homebrew@
8d45d93048676ef171b8a39a053e739c770cf832 for version 0.4.8 but it's not
needed since they are including openssl in their source code since
0.5.4, commit :joyent/node@e80cac622569dda0f6753b452ba3e5085a9d09e5