[embedded] Add an indirect enum test for the stride/size bug

Author: kubamracek

test/embedded/arrays-enums.swift

@@ -0,0 +1,20 @@
+// RUN: %target-run-simple-swift(-enable-experimental-feature Embedded -parse-as-library -runtime-compatibility-version none -wmo -Xfrontend -disable-objc-interop) | %FileCheck %s
+
+// REQUIRES: swift_in_compiler
+// REQUIRES: executable_test
+// REQUIRES: optimized_stdlib
+// REQUIRES: OS=macosx || OS=linux-gnu
+
+enum Node {
+  indirect case inner(Node, Node)
+  case leaf(Int)
+}
+
+@main
+struct Main {
+  static func main() {
+    _ = [Node.leaf(42), Node.leaf(42)]
+    print("OK!")
+    // CHECK: OK!
+  }
+}