xfstests: fix incorrect redirect in generic/233

xfstests: fix incorrect redirect in generic/233

generic/233 attempts to direct output to tee, but instead of using a
pipe it uses an append operator. Hence it leaves a file named "tee"
in the root directory of the xfstests execution path. Just direct
the output to the $seqres.full file rather than trying to tee it
into the test output as well.

Reported-by: "Michael L. Semon" <mlsemon35@gmail.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Rich Johnston <rjohnston@sgi.com>