x86_64 Bitcoin Software Installed on M1s

[shannona]

At time of release for 1.0.2, the arm64 version of bitcoind fails on our M1 test mac with an "Error 9". As a result, the x86_64 version is used for both installations.

This should certainly be rechecked when a new version of Bitcoin is released. If the arm64 bitcoind is now working on an M1, then the architecture check in Standalone script can be uncommented to automatically use it. There may also need to be a change in the Helpers Defaults file, which has its own variable for the architecture-named tar file (but it's unclear if it's used).