message: update set_err
  Use `swoole_strerror` to support swoole error code
diff: @@ -151,7 +151,7 @@ public:
  inline void set_err(int e)
  {
  errCode = errno = e;
  - errMsg = e ? strerror(e) : "";
  + errMsg = e ? swoole_strerror(e) : "";
  }
  inline void set_err(int e, const char *s)
  @@ -160,12 +160,6 @@ public:
  errMsg = s;
  }
  - inline void set_err(enum swErrorCode e)
  - {
  - errCode = errno = e;
  - errMsg = swoole_strerror(e);
  - }
  -
  /* set connect read write timeout */
  inline void set_timeout(double timeout, int type = SW_TIMEOUT_ALL)
  {
  