Bug 1332240 - Properly guard a test case on SharedArrayBuffer. r=bbouvier

--HG--
extra : rebase_source : 4b46fea5b3a7d51072ca45ce3d6183e958f4e728
extra : amend_source : 4bc5d458331b8d8c7ba80be8c30750ce30dafbce
extra : source : 06b95cdb34efc10bbe4ac8eb58f6261dcb78b75a

js/src/tests/js1_8_5/extensions/dataview.js

@@ -1649,4 +1649,6 @@ function test(sharedMem) {
 }
 
 test(false);
-test(true);
+
+if (this.SharedArrayBuffer)
+    test(true);