Add testcase for #14864 (#14928)

* Add testcase for #14864

* :D

tests/arc/bmodule.nim

@@ -0,0 +1,4 @@
+import cmodule
+
+for i in @[1, 2, 3].cycle():
+  echo i

tests/arc/cmodule.nim

@@ -0,0 +1,4 @@
+iterator cycle*[T](s: openArray[T]): T =
+  let s = @s
+  for x in s:
+    yield x

tests/arc/t14864.nim

@@ -0,0 +1,5 @@
+discard """
+  cmd: "nim c --gc:arc $file"
+"""
+
+import bmodule