Added flags clear for thread and new constructor for queue.

include/sta/rtos/thread.hpp

@@ -98,6 +98,13 @@ namespace sta
 		 */
 		uint32_t wait(uint32_t flags);
 
+		/**
+		 * @brief Clears the thread flags set for this thread.
+		 *
+		 * @return Returns the thread flags that set before clearing.
+		 */
+		uint32_t clear(uint32_t flags);
+
 		/**
 		 * @brief Send termination request to thread.
 		 */