Clam: OpenSSL dep

We’ve been picking up on the system OpenSSL here as well.

Executing an ``` otool -L ``` on the clamav binaries reveals:

```
/usr/lib/libssl.0.9.8.dylib (compatibility version 0.9.8, current
version 0.9.8)
/usr/lib/libcrypto.0.9.8.dylib (compatibility version 0.9.8, current
version 0.9.8)
```

This fixes that.
```
/usr/local/opt/openssl/lib/libssl.1.0.0.dylib (compatibility version
1.0.0, current version 1.0.0)
/usr/local/opt/openssl/lib/libcrypto.1.0.0.dylib (compatibility version
1.0.0, current version 1.0.0)
```