xfstests: RESULTS_DIR needs to be an absolute path

Some tests 'cd <somedir>' and then direct output to $RESULT_DIR,
which fails if the current working directory is not $here.
Regardless, if an external results directory is to be used it needs
to have a full path specified and the use of $here as the base of
the results files is completely incorrect.

Hence change all the $here/$seqres* references to simply be
$seqres*, and instead encode the full path to the results in
$RESULT_DIR.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Phil White <pwhite@sgi.com>
Signed-off-by: Rich Johnston <rjohnston@sgi.com>

tests/generic/089

@@ -75,8 +75,8 @@ mtab()
 
 	echo directory entries:
 	ls | grep mtab
-	echo directory entries >> $here/$seqres.full
-	ls -li >> $here/$seqres.full
+	echo directory entries >> $seqres.full
+	ls -li >> $seqres.full
 }
 
 # directory with only a few entries