Fix build and test failures from packed array optimizations.

test/mjsunit/unbox-double-arrays.js

Index: test/mjsunit/unbox-double-arrays.js
diff --git a/test/mjsunit/unbox-double-arrays.js b/test/mjsunit/unbox-double-arrays.js
index d5f78167f8d02270e5ec30a3327030605f670028..ac039930c323e4d2a11bdefd02be47468b504f8a 100644
--- a/test/mjsunit/unbox-double-arrays.js
+++ b/test/mjsunit/unbox-double-arrays.js
@@ -278,7 +278,8 @@ function testOneArrayType(allocator) {
                       expected_array_value(7));
 
   %DeoptimizeFunction(test_various_loads6);
-  gc();
+  %ClearFunctionTypeFeedback(test_various_stores);
+  %ClearFunctionTypeFeedback(test_various_loads7);
 
   // Test stores for non-NaN.
   var large_array = new allocator(large_array_size);