Fix Regress1465 on gc stress builder.

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/17059006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15177 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/test-heap.cc

@@ -2215,6 +2215,7 @@ static int CountMapTransitions(Map* map) {
 // Test that map transitions are cleared and maps are collected with
 // incremental marking as well.
 TEST(Regress1465) {
+  i::FLAG_stress_compaction = false;
   i::FLAG_allow_natives_syntax = true;
   i::FLAG_trace_incremental_marking = true;
   CcTest::InitializeVM();