stress, hwpoison.sh: fix fs_metadata workload for local test dir

This patch is to fix below problem:
...
result summary:
	fs_metadata -- no test finished
	 details: /root/git/mce-test/stress/log/fs_metadata/fs_metadata.log
	fsck.ext3 -- fsck on /dev/loop5 got pass

totally 1 task-groups report failures
...
...

[04-05 16:29:08] thread 0 starts with pid 25027
tee: ./hwpoison/fs_metadata/k-threads.pid: No such file or directory
25027

Signed-off-by: Evan McNabb <emcnabb@redhat.com>
Signed-off-by: Haicheng Li <haicheng.li@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
1 file changed