[K/N] Implement isExperimentalMM intrinsic

kotlin-native/runtime/src/main/kotlin/kotlin/native/Platform.kt

@@ -5,6 +5,8 @@
 package kotlin.native
 
 import kotlin.native.internal.GCUnsafeCall
+import kotlin.native.internal.TypedIntrinsic
+import kotlin.native.internal.IntrinsicType
 
 /**
  * Operating system family.
@@ -131,3 +133,7 @@ private external fun Platform_getCleanersLeakChecker(): Boolean
 
 @GCUnsafeCall("Konan_Platform_setCleanersLeakChecker")
 private external fun Platform_setCleanersLeakChecker(value: Boolean): Unit
+
+@TypedIntrinsic(IntrinsicType.IS_EXPERIMENTAL_MM)
+@ExperimentalStdlibApi
+external fun isExperimentalMM(): Boolean

kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/IntrinsicType.kt

@@ -54,6 +54,7 @@ class IntrinsicType {
         const val IDENTITY                      = "IDENTITY"
         const val IMMUTABLE_BLOB                = "IMMUTABLE_BLOB"
         const val INIT_INSTANCE                 = "INIT_INSTANCE"
+        const val IS_EXPERIMENTAL_MM            = "IS_EXPERIMENTAL_MM"
 
         // Enums
         const val ENUM_VALUES                   = "ENUM_VALUES"