xfs/032: fix test failure on kernels which don't support bs > ps

xfs/032: fix test failure on kernels which don't support bs > ps

When trying to mount a file system with a block size > page size on
kernel which doesn't support this, suppress the error messages from
showing up in the output file lest it cause test failures.

Fixes: 0b66f6efd669 ("xfs/032: try running on blocksize > pagesize filesystems")
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Zorro Lang <zlang@kernel.org>