You should have a link such as:
https://github.com/bitpay/bitcoin/releases/download/v0.12.1-bitcore-2/bitcoin-0.12.1-linux64.tar.gz

Here is the script that downloads:
https://github.com/bitpay/bitcore-node/blob/master/scripts/download

This is an issue with the script as uname -m doesn't return x86_32 for all 32-bit architectures.

Looks like it needs to be matching i686. There also is another issue, as there isn't an exit failure either.

OK I need this server set up today. So if I clone this repo and the bitcore-node repo, which script do I edit in the bitcore repo to point to my cloned , and edited version of the bitcore-node repo that will download bitcoin for i686?

Just submitted a PR to fix this: https://github.com/bitpay/bitcore-node/pull/486/files

Thanks.