[WASM] Document Array types

libraries/stdlib/wasm/builtins/kotlin/Array.kt

@@ -39,6 +39,8 @@ public class Array<T> @PublishedApi internal constructor(size: Int) {
      *
      * The function [init] is called for each array element sequentially starting from the first one.
      * It should return the value for an array element given its index.
+     *
+     * @throws RuntimeException if the specified [size] is negative.
      */
     public inline constructor(size: Int, init: (Int) -> T)