Swift 5.3 release process

[rex-remind (Rex)]

Curious if Amazon Linux 2 will be included in support.

Building Swift on Amazon Linux 2

About a month ago, Fabian posted on the forums here (Official platform support for other Linux Distributions (and a case for Amazon Linux 2)) and suggested that Amazon Linux 2 would be a good target for official Swift support. I won't recap all of his points here, but I will say that his post started some new discussions and focused some that were already underway, and that push caused interested folks to share their progress and work on the remaining issues. Rather than keep that discussion o…