Automate aarch64 cmake arg inclusion for when needed
Does a simple check to see if it's aarch64 is being targeted. If so, it adds "-DAARCH64=true" to the cmake args. Also updates documents to remove a now redundant instruction.
Does a simple check to see if it's aarch64 is being targeted. If so, it adds "-DAARCH64=true" to the cmake args. Also updates documents to remove a now redundant instruction.