added function cache for swoole_client.
added function cache for swoole_client.

LinkedDestiny/swoole-src,tutanhamon/swoole-src,LinkedDestiny/swoole-src,swoole/swoole-src,tutanhamon/swoole-src,LinkedDestiny/swoole-src,swoole/swoole-src,tutanhamon/swoole-src,tutanhamon/swoole-src,swoole/swoole-src,tutanhamon/swoole-src,swoole/swoole-src,swoole/swoole-src,tutanhamon/swoole-src,LinkedDestiny/swoole-src,swoole/swoole-src,LinkedDestiny/swoole-src,LinkedDestiny/swoole-src,swoole/swoole-src,tutanhamon/swoole-src,LinkedDestiny/swoole-src