[tests]: fix exponentiation in harmony array-concat tests

test/mjsunit/harmony/array-concat.js

Index: test/mjsunit/harmony/array-concat.js
diff --git a/test/mjsunit/harmony/array-concat.js b/test/mjsunit/harmony/array-concat.js
index 286aefd29a5c3d3933ab5c25ab4f322434e2eaaf..c1ff92c8c3df03100571eafb0f91dd2ad1abbcec 100644
--- a/test/mjsunit/harmony/array-concat.js
+++ b/test/mjsunit/harmony/array-concat.js
@@ -245,7 +245,7 @@ function testConcatTypedArray(type, elems, modulo) {
 }
 
 (function testConcatSmallTypedArray() {
-  var max = [2^8, 2^16, 2^32, false, false];
+  var max = [Math.pow(2, 8), Math.pow(2, 16), Math.pow(2, 32), false, false];
   [
     Uint8Array,
     Uint16Array,
@@ -259,7 +259,7 @@ function testConcatTypedArray(type, elems, modulo) {
 
 
 (function testConcatLargeTypedArray() {
-  var max = [2^8, 2^16, 2^32, false, false];
+  var max = [Math.pow(2, 8), Math.pow(2, 16), Math.pow(2, 32), false, false];
   [
     Uint8Array,
     Uint16Array,