Fix SmiCompare on 64 bit to distinguish between comparisons where...

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
===================================================================
--- src/arm/full-codegen-arm.cc	(revision 7153)
+++ src/arm/full-codegen-arm.cc	(working copy)
@@ -3131,8 +3131,8 @@
   // Fetch the map and check if array is in fast case.
   // Check that object doesn't require security checks and
   // has no indexed interceptor.
-  __ CompareObjectType(object, scratch1, scratch2, FIRST_JS_OBJECT_TYPE);
-  __ b(lt, &slow_case);
+  __ CompareObjectType(object, scratch1, scratch2, JS_ARRAY_TYPE);
+  __ b(ne, &slow_case);
   // Map is now in scratch1.
 
   __ ldrb(scratch2, FieldMemOperand(scratch1, Map::kBitFieldOffset));