common: Set thread name for cm_pipeline_thread

Without setting the thread name, the name is inherited from the spawn
thread, which is the graphics thread in this case. This was confusing
when debugging the multithread behavior.

Author: norihiro

src/common.c

@@ -377,6 +377,8 @@ static void *cm_pipeline_thread(void *data)
 	blog(LOG_DEBUG, "entering cm_pipeline_thread data=%p", data);
 	struct cm_source *src = data;
 
+	os_set_thread_name("color-monitor");
+
 	pthread_mutex_lock(&src->pipeline_mutex);
 	while (!src->request_exit) {
 		int next = (src->i_read_queue + 1) % CM_SURFACE_QUEUE_SIZE;