fstests: establish baseline for realtime reflink fuzz tests [v2.0 19/29]

Establish a baseline golden output for the realtime reflink fuzz tests.
This shouldn't be merged upstream because the output is very dependent
on the geometry of the filesystem that is created.

This has been running on the djcloud for months with no problems.  Enjoy!

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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