core: enable "log-with-ptr" by default for platform and route-manager

Arguably, we currently only have one instance of NMPlatform,
NMRouteManager, NMDefaultRouteManager -- the one owned by the
NMNetns singleton.

Hence, all these instances we create with "log-with-ptr" set explicitly
to false.

In the future we want to support namespaces, and it will be be common to
have multiple instances. For that we have "log-with-ptr" so we are able
to disambiguiate the logging.

Change the default to TRUE because it makes more sense. It has currently
no effect as the default is never used.

src/nm-default-route-manager.c

@@ -1549,7 +1549,7 @@ nm_default_route_manager_class_init (NMDefaultRouteManagerClass *klass)
 
 	obj_properties[PROP_LOG_WITH_PTR] =
 	    g_param_spec_boolean (NM_DEFAULT_ROUTE_MANAGER_LOG_WITH_PTR, "", "",
-	                          FALSE,
+	                          TRUE,
 	                          G_PARAM_WRITABLE |
 	                          G_PARAM_CONSTRUCT_ONLY |
 	                          G_PARAM_STATIC_STRINGS);

src/nm-route-manager.c

@@ -1297,7 +1297,7 @@ nm_route_manager_class_init (NMRouteManagerClass *klass)
 
 	obj_properties[PROP_LOG_WITH_PTR] =
 	    g_param_spec_boolean (NM_ROUTE_MANAGER_LOG_WITH_PTR, "", "",
-	                          FALSE,
+	                          TRUE,
 	                          G_PARAM_WRITABLE |
 	                          G_PARAM_CONSTRUCT_ONLY |
 	                          G_PARAM_STATIC_STRINGS);

src/platform/nm-platform.c

@@ -4645,7 +4645,7 @@ nm_platform_class_init (NMPlatformClass *platform_class)
 	g_object_class_install_property
 	 (object_class, PROP_LOG_WITH_PTR,
 	     g_param_spec_boolean (NM_PLATFORM_LOG_WITH_PTR, "", "",
-	                           FALSE,
+	                           TRUE,
 	                           G_PARAM_WRITABLE |
 	                           G_PARAM_CONSTRUCT_ONLY |
 	                           G_PARAM_STATIC_STRINGS));