Test that we can get all extent/hole information for files with more
than 16 extents and 15 holes which require a reallocation based on
XFS_IOC_FSGETXATTR.
Based on a testcase from Tomasz Majkowski <moosh009@gmail.com>.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>