llseek/llseek03.c: add SEEK_CUR, SEEK_END flag test

create a new case to test SEEK_CUR, SEEK_END flag for llseek(2)

Signed-off-by: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com>
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
link/link08.c: add new error tests

Add new error number tests for link(2):
* EPERM
* EXDEV
* EROFS
* ELOOP

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>