xfs_io: move stat functions to new file

Adding statx will add a bit of code, so break stat-related
functions out of open.c into their own new file.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
5 files changed