Merge pull request #24 from tc1989tc/master

增加test_ringbuff.c测试函数,修改ringbuff alloc 处理逻辑
Adds y_message_send/y_message_register API.

Signed-off-by: wuxin <82828068@qq.com>
增加了y_message_send/y_message_register的接口申明

Signed-off-by: wuxin <82828068@qq.com>
Merge pull request #19 from gridnow/master

y_send_msg