Add fixed array to Type::LubBitset

R=mvstanton@chromium.org

Review URL: https://chromiumcodereview.appspot.com/19960002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15807 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/types.cc

@@ -206,6 +206,7 @@ int Type::LubBitset() {
       case DECLARED_ACCESSOR_INFO_TYPE:
       case EXECUTABLE_ACCESSOR_INFO_TYPE:
       case ACCESSOR_PAIR_TYPE:
+      case FIXED_ARRAY_TYPE:
         return kInternal;
       default:
         UNREACHABLE();