Bug 932687: Update value of dict mode in test; r=h4writer

MozReview-Commit-ID: FaFbhKhg2NM

--HG--
extra : rebase_source : a9f2d765de402680e0e8f998de28a83bd35eaac2

js/src/jit-test/tests/pic/to-dictionary.js

@@ -1,5 +1,5 @@
 function f() {
-    var MAX_HEIGHT = 64;
+    var MAX_HEIGHT = 512;
     var obj = {};
     for (var i = 0; i < MAX_HEIGHT; i++)
         obj['a' + i] = i;