Add arm64 build support using the build script

[jamespack]

Summary of the Pull Request

Enable build support for ARM64 in the build script

References and Relevant Issues

NONE

Detailed Description of the Pull Request / Additional comments

ARM64 is becoming more prevalent, and terminal should be the first tool we reach for on that platform as well. This pull request lights up build support on ARM64 in the build script.

Validation Steps Performed

it built successfully following the documentation on my Snapdragon Surface Laptop :)

PR Checklist

• [ ] Closes #xxx
• [ ] Tests added/passed
• [ ] Documentation updated
  • If checked, please file a pull request on our docs repo and link it here: #xxx
• [ ] Schema updated (if necessary)

[jamespack]

Added clarity to where exactly this adds support.