[LTP] [PATCH v2] syscalls/statx04: use stx_attributes_mask before test

[Cyril Hrubis]

Hi!
> also Cyril noted on Github issue #557 [1]:
> "However I'm not sure that we should do this since kernel devs declared this to be bug after all."
> 
> So maybe we should wait before applying it.
> 
> @Cyril: can you please post link to discussion in LKML?

I've talked to Jan Kara in person while developing these tests, so there
is no track of this discussion.

I guess that the best we can do here is to:

* Apply this patch, since the test should generally check only for flags
  that are supported in the bitflag returned by the syscall

* Add another test that checks that these bitflags are enabled for new
  enough kernels for certain set of filesystems

-- 
Cyril Hrubis
chrubis@suse.cz