Vcf symlink

This is a pretty junky script for Operations and/or data-transfer to symlink a bunch of build's SNV and Indel files. It is unclear to me how to test this so the test case is just a use of the module.
@davidlmorton Unfortunately, there's no difference:

```
$ grep 'processing_profile\b.*=>' Genome/Model/Build.pm 
        processing_profile      => { via => 'model', is => 'Genome::ProcessingProfile' },
```