llseek/llseek03.c: cleanup

Remove the meaningless code using strcpy in setup() and
fix some output messages.

Suggested-by: Cyril Hrubis <chrubis@suse.cz>
Signed-off-by: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com>
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>