Enable --smi-only-arrays flag in test case for no-snapshot build.

test/mjsunit/element-kind.js

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-// Flags: --allow-natives-syntax
-// Test element kind of objects
+// Flags: --allow-natives-syntax --smi-only-arrays
+// Test element kind of objects.
+// Since --smi-only-arrays affects builtins, its default setting at compile
+// time sticks if built with snapshot.  If --smi-only-arrays is deactivated
+// by default, only a no-snapshot build actually has smi-only arrays enabled
+// 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.
+
 
 support_smi_only_arrays = %HasFastSmiOnlyElements([]);
 
+if (support_smi_only_arrays) {
+  print("Tests include smi-only arrays.");
+} else {
+  print("Tests do NOT include smi-only arrays.");
+}
+
 var element_kind = {
   fast_smi_only_elements            :  0,
   fast_elements                     :  1,
   fast_double_elements              :  2,
   dictionary_elements               :  3,
   external_byte_elements            :  4,
   external_unsigned_byte_elements   :  5,
   external_short_elements           :  6,
   external_unsigned_short_elements  :  7,
   external_int_elements             :  8,
@@ skipping 142 matching lines @@
     assertKind(element_kind.fast_double_elements, c);
   } else {
     assertKind(element_kind.fast_elements, c);
   }
 }
 for (var i = 0; i < 3; i++) {
   crankshaft_test();
 }
 %OptimizeFunctionOnNextCall(crankshaft_test);
 crankshaft_test();