ironically, doesn't work on go-ipfs

go-ipfs uses `ipfs/ipfs` path in the tarball, so this doesn't work.

The right way to fix this is to either:
- make the untar use whatever binary it finds (sketch and prone to failure if it has multiple)
- make dist.ipfs.io have some info somewhere about what the binary is called.
- make the tarballs bear the name in a file present in all tarballs (may need to redo all the tarballs)