Helgrind cannot properly handle Ceph's use of std::mutex --
resulting in numerous false positives and potential assertion
failures.
Signed-off-by: Jason Dillaman <dillaman@redhat.com>
This checks locking problems. This can be a separate facet for
workunits, but for now it requires a manual 2nd configuration for
rbd_fsx.
Signed-off-by: Josh Durgin <jdurgin@redhat.com>