xfs/508: fix test for 64k blocksize

xfs/508: fix test for 64k blocksize

It turns out that icreate transactions will try to reserve quite a bit
of space on a 64k fsblock filesystem -- enough to handle the worst case
parent directory expansion, a new inode chunk, and these days a parent
pointer as well.  This can work out to quite a bit of space:

fsblock		reservation
1k		172K
4k		368K
16k		1136K
64k		3650K

Unfortunately, this test sets its block quota limits at 1-2MB, so we
can't even create a child file.  Bump the limits up by 10x so that this
test will pass even if there's more metadata size creep in the future.

Fixes: f769a923f576df ("xfs: project quota ineritance flag test")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zorro Lang <zlang@kernel.org>