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

[xuyang2018.jy@fujitsu.com]

Hi Richard
> Hello Yang,
> 
> The fix/feature appears easy to backport, so I would suggest just adding the git
> commit tags to the test. If the feature is required then people can
> backport the patches, otherwise they can filter out the test.
> 

I will add these linux tags into description and send a v4.

Best Regards
Yang Xu