Introduce exitProcess(status) returning Nothing.

#KT-10441 Fixed

libraries/stdlib/src/kotlin/system/Process.kt

@@ -0,0 +1,15 @@
+@file:kotlin.jvm.JvmName("ProcessKt")
+@file:kotlin.jvm.JvmVersion
+package kotlin.system
+
+/**
+ * Terminates the currently running Java Virtual Machine. The
+ * argument serves as a status code; by convention, a nonzero status
+ * code indicates abnormal termination.
+ *
+ * This method never returns normally.
+ */
+public fun exitProcess(status: Int): Nothing {
+    System.exit(status)
+    throw RuntimeException("System.exit returned normally, while it was supposed to halt JVM.")
+}