Add test for class property in category.

Test/category_properties.m

@@ -4,6 +4,7 @@
 
 @interface Test (Property)
 @property (readonly) int val;
+@property (class, readonly) int val2;
 @end
 
 @interface Test (Property2)
@@ -12,6 +13,7 @@
 
 
 @implementation Test (Property)
+@dynamic val2;
 - (int)val { return 0; }
 @end
 
@@ -29,5 +31,11 @@ int main(int argc, char** argv)
 	prop = class_getProperty(test, "val2");
 	assert(prop);
 	assert(strcmp("Ti,R,D", property_getAttributes(prop)) == 0);
+#ifdef DGS_RUNTIME_V2
+	test = object_getClass(test);
+	objc_property_t prop = class_getProperty(test, "val2");
+	assert(prop);
+	assert(strcmp("Ti,R,D", property_getAttributes(prop)) == 0);
+#endif
 }