Summary: We didn't define the build for aarch64 locally previously, so packer didn't know how to bundle it up. Since it shares the layout of x64, we will also save on CDN resources because it will automatically get deduplicated.
Reviewed By: lblasa, antonk52
Differential Revision: D46144879
fbshipit-source-id: 20087010db02d3965ed0c5d4add72e0b19849d13
a711a578b1