Added copyToArray intrinsic method.

#KT-3352 fixed

libraries/stdlib/src/kotlin/ArraysJVM.kt

@@ -107,4 +107,7 @@ public inline fun ByteArray.inputStream(offset: Int, length: Int) : ByteArrayInp
 public inline fun ByteArray.toString(encoding: String): String = String(this, encoding)
 public inline fun ByteArray.toString(): String = String(this)
 
-public inline fun ByteArray.toString(encoding: Charset) : String = String(this, encoding)
+public inline fun ByteArray.toString(encoding: Charset) : String = String(this, encoding)
+
+[Intrinsic("kotlin.collections.copyToArray")] public fun <reified T> Collection<T>.copyToArray(): Array<T> =
+        throw UnsupportedOperationException()

libraries/stdlib/test/js/javautilCollectionsTest.kt

@@ -29,4 +29,9 @@ class JavautilCollectionsTest {
         Collections.sort(list, COMPARATOR)
         assertEquals(SORTED_TEST_LIST, list)
     }
+
+    test fun collectionToArray() {
+        val array = TEST_LIST.copyToArray()
+        assertEquals(array.toList(), TEST_LIST)
+    }
 }