Turn off GcStress for another mjsunit test that asserts heavily on array

ElementsKind.

BUG=
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/23983041

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16850 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/osr-elements-kind.js

@@ -40,6 +40,11 @@
 // in this test case.  Depending on whether smi-only arrays are actually
 // enabled, this test takes the appropriate code path to check smi-only arrays.
 
+// Reset the GC stress mode to be off. Needed because AllocationMementos only
+// live for one gc, so a gc that happens in certain fragile areas of the test
+// can break assumptions.
+%SetFlags("--gc-interval=-1")
+
 support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8));
 
 if (support_smi_only_arrays) {