stress2: Fix cleanup

tools/test/stress2/misc/mmap3.sh

@@ -42,13 +42,13 @@ while [ `date '+%s'` -lt $((start + 5 * 60)) ]; do
 	./mmap3
 done
 echo "Expect Segmentation faults"
-trap "ls /tmp/mmap3* | grep -E 'mmap3\.[0-9]{6}\.[0-9]{4}$' | xargs rm -v" \
-    EXIT INT
+trap "ls /tmp/mmap3* 2>/dev/null | grep -E 'mmap3\.[0-9]{6}\.[0-9]{4}$' | \
+    xargs rm -v" EXIT INT
 start=`date '+%s'`
 while [ `date '+%s'` -lt $((start + 5 * 60)) ]; do
 	./mmap3 random
 done
-rm -f mmap3 mmap3.core
+rm -f /tmp/mmap3 mmap3.core
 exit
 
 EOF