soxr 0.1.1 (new formula)

Part 1 of closing #34135.
It doesn't seem to have any method to take a prefix argument anywhere. The build documents don't even make mention of such a method, just say to do ``` ./go && make install ``` which auto-installs everything into /usr/local. I tried a prefix in a couple of places, but it errored out as unrecognised. I'll try and get into my SF account and file a bug report.