[test] Add PrepareFunctionForoptimize in mjsunit/regress/regress-385565

Bug: v8:9207
Change-Id: Ie137e8c2395e835d532394495d892ad9b2cfc90d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1601133
Commit-Queue: Mythri Alle <mythria@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Auto-Submit: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61322}

test/mjsunit/regress/regress-385565.js

@@ -43,6 +43,7 @@ Array.prototype.f = function() {
 var o1 = {m: 1};
 var o2 = {a: 0, m:1};
 
+%PrepareFunctionForOptimization(callsFReceiver);
 var r1 = callsFReceiver(o1);
 callsFReceiver(o1);
 %OptimizeFunctionOnNextCall(callsFReceiver);
@@ -50,6 +51,8 @@ var r2 = callsFReceiver(o1);
 assertOptimized(callsFReceiver);
 callsFReceiver(o2);
 assertUnoptimized(callsFReceiver);
+
+%PrepareFunctionForOptimization(callsFReceiver);
 var r3 = callsFReceiver(o1);
 
 assertEquals(1, r1);