Intrinsics for 'reversed': array.indices

#KT-21323 In Progress

compiler/testData/codegen/bytecodeText/forLoop/forInReversed/forInReversedArrayIndices.kt

@@ -0,0 +1,15 @@
+// WITH_RUNTIME
+import kotlin.test.*
+
+fun box(): String {
+    val arr = intArrayOf(1, 1, 1, 1)
+    var sum = 0
+    for (i in arr.indices.reversed()) {
+        sum = sum * 10 + i + arr[i]
+    }
+    assertEquals(4321, sum)
+
+    return "OK"
+}
+
+// 0 reversed