A64: Synchronize with r15814.

src/types.cc

Index: src/types.cc
diff --git a/src/types.cc b/src/types.cc
index ff96b5a0d53fee65e5e9e6eeca2623d4eab372ff..bea140ec4ab8879e3243f27f18ef5ad28debcad8 100644
--- a/src/types.cc
+++ b/src/types.cc
@@ -180,6 +180,7 @@ int Type::LubBitset() {
       case JS_SET_TYPE:
       case JS_MAP_TYPE:
       case JS_WEAK_MAP_TYPE:
+      case JS_WEAK_SET_TYPE:
         if (map->is_undetectable()) return kUndetectable;
         return kOtherObject;
       case JS_ARRAY_TYPE:
@@ -205,6 +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();