Fix garbage cycle collection for kotlin.Array

backend.native/tests/build.gradle

@@ -2117,6 +2117,10 @@ task memory_cycles0(type: RunKonanTest) {
     source = "runtime/memory/cycles0.kt"
 }
 
+task memory_cycles1(type: RunKonanTest) {
+    source = "runtime/memory/cycles1.kt"
+}
+
 task memory_basic0(type: RunKonanTest) {
     source = "runtime/memory/basic0.kt"
 }

backend.native/tests/runtime/memory/cycles1.kt

@@ -0,0 +1,17 @@
+package runtime.memory.cycles1
+
+import kotlin.test.*
+import konan.ref.*
+
+@Test fun runTest() {
+    val weakRefToTrashCycle = createLoop()
+    konan.internal.GC.collect()
+    assertNull(weakRefToTrashCycle.get())
+}
+
+private fun createLoop(): WeakReference<Any> {
+    val loop = Array<Any?>(1, { null })
+    loop[0] = loop
+
+    return WeakReference(loop)
+}