[static-stdlib] Move static-executable-args.lnk under stdlib/public/Resources/linux

[kateinoigakukun]

This is a preparatory change for adding a static executable support for WASI

[kateinoigakukun]

@swift-ci Please smoke test

[kateinoigakukun]

@swift-ci Please smoke test

[MaxDesiatov]

@swift-ci build toolchain

[kateinoigakukun]

I tested the built toolchain and it looks working at least for a simple scenario

$ curl https://download.swift.org/tmp/pull-request/66423/470/ubuntu2004/PR-ubuntu2004.tar.gz | tar xz
$ echo 'print("Hello")' > main.swift
$ ./usr/bin/swiftc main.swift -static-executable
$ ./main

[MaxDesiatov]

Please also test a simple async @main function with static linking on Linux, which implicitly requires Dispatch. We had multiple regressions in that area recently, so I'm cautious about changes in that area.

[kateinoigakukun]

Sure! I've tested with the following snippets and they work well

@main
struct Main {
  static func main() {
    print("ok")
  }
}

@main
struct Main {
  static func main() async {
    try! await Task.sleep(nanoseconds: 1000)
    print("ok")
  }
}

import Foundation

@main
struct Main {
  static func main() {
    print("ok", UUID())
  }
}

And checked .lnk is installed in the correct place usr/lib/swift_static/linux/static-executable-args.lnk