Epoch built for M1 Mac

[hokeun]

I propose adding ARM 64 Mac OS X as an Epoch build environment to support M1 Mac.

[lhstrh]

Good idea! @a-sr has a major refactoring of the build system that is basically ready to go. Let's have him decide which should go first?

[edwardalee]

Looks good to me!

[a-sr]

Since the refactoring is already done, PR #1482 will removed the changed file anyway. Hence, I would suggest to drop this PR to prevent a conflict with #1482, unless someone needs an Epoch IDE for an M1 Apple before we merge #1482.
In any case, I created an PR in the new epoch repo (lf-lang/epoch#1) that will add M1 support for future Epoch versions.

[hokeun]

Thanks, everyone! I'm not sure about the timeline for merging #1482, but I would like to suggest merging this for now as some people (including myself and some of my students/TAs who are preparing for the embedded systems class at Hanyang) are using M1 Mac. I checked #1482, and it seems to simply remove this pom.xml file. Thus, I think this change shouldn't block #1482. Please let me know if this causes any conflicts, I will be happy to help and revert this.