Marked global mutable state in the benchmark as thread local

performance/src/main/kotlin-jvm/FakeKonanNamespace.kt

@@ -0,0 +1,5 @@
+package org.jetbrains.ring
+
+class konan {
+    annotation class ThreadLocal
+}

performance/src/main/kotlin/org/jetbrains/ring/Utils.kt

@@ -21,6 +21,7 @@ import kotlin.system.measureNanoTime
 //-----------------------------------------------------------------------------//
 
 class Blackhole {
+    @konan.ThreadLocal
     companion object {
         var consumer = 0
         fun consume(value: Any) {
@@ -32,6 +33,7 @@ class Blackhole {
 //-----------------------------------------------------------------------------//
 
 class Random() {
+    @konan.ThreadLocal
     companion object {
         var seedInt = 0
         fun nextInt(boundary: Int = 100): Int {