Fix DeepRecursiveFunction in worker on Native

Add `@SharedImmutable` to `UNDEFINED_RESULT` top-level property.

libraries/stdlib/src/kotlin/util/DeepRecursive.kt

@@ -7,6 +7,7 @@ package kotlin
 
 import kotlin.coroutines.*
 import kotlin.coroutines.intrinsics.*
+import kotlin.native.concurrent.SharedImmutable
 
 /**
  * Defines deep recursive function that keeps its stack on the heap,
@@ -124,6 +125,7 @@ public sealed class DeepRecursiveScope<T, R> {
 @ExperimentalStdlibApi
 private typealias DeepRecursiveFunctionBlock = suspend DeepRecursiveScope<*, *>.(Any?) -> Any?
 
+@SharedImmutable
 private val UNDEFINED_RESULT = Result.success(COROUTINE_SUSPENDED)
 
 @Suppress("UNCHECKED_CAST")