[LTP] [PATCH v2 1/2] openat2: define _GNU_SOURCE and include <fcntl.h>

[Li Wang]

> Thank you for your time. I try to send a patch to add the outcome to
> doc/developers/ground_rules.rst and wait for ack of others to get broader
> consensus about it.

That's awesome.

Once we get the consensus, I think we need do a cleanup work for the whole project
to drop <foo.h> from testcase which includes "lapi/foo.h".

And also go through all LAPI headers, to garantee each "lapi/foo.h" includes
the original <foo.h>.

-- 
Regards,
Li Wang