lapi: fcntl.h: Add O_NOATIME

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
open/open02.c: cleanup

* Delete some useless commtents.
* Move the test body from main() to open_verify().
* Remove tst_tmpdir().
* Some cleanup.

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
open/open02.c: add EPERM errno test

Add EPERM errno test for open(2).

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