mkdir/mkdir03.c: cleanup

Fix FSF address
Make use of SAFE_MACROS()
Some cleanup

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
mkdir/mkdir03.c: add new error number tests

Add ELOOP, EROFS error number tests fof mkdir(2)

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
mkdir03: add options in runtest files

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>