Test FeedbackVectorPreservedAcrossRecompiles needs crankshaft

The new test didn't recognize that non-sse2 builds on ia32 would
disable crankshaft.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/189263007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19716 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/test-compiler.cc

@@ -316,6 +316,7 @@ TEST(FeedbackVectorPreservedAcrossRecompiles) {
   if (i::FLAG_always_opt || !i::FLAG_crankshaft) return;
   i::FLAG_allow_natives_syntax = true;
   CcTest::InitializeVM();
+  if (!CcTest::i_isolate()->use_crankshaft()) return;
   v8::HandleScope scope(CcTest::isolate());
 
   // Make sure function f has a call that uses a type feedback slot.