generic/244: avoid creating too large random ID

ppc64 hosts are generating too large random IDs like 725294314141253632,
which causes all sorts of errors in test.

Fix it by using format "-t uI" for 'int' size and it works fine on all
platforms.

Signed-off-by: Eryu Guan <eguan@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

tests/generic/244

@@ -83,7 +83,7 @@ ITERATIONS=100
 
 # A few extra on the off chance we get dups
 for I in `seq 1 $(($ITERATIONS+10))`; do
-	ID=`od -N 4 -t uL -An /dev/urandom | tr -d " "`
+	ID=`od -N 4 -t uI -An /dev/urandom | tr -d " "`
 	echo $ID >> $tmp.1
 done